Protecting over 200 million PCs, Macs, & Mobiles – more than any other antivirus

January 19th, 2010

Avast! Version 5.0 is here!!!

Today is the big day—the day we (and many of you) have been waiting for—we are starting the release of the Version 5.0 products today. This is a pretty complicated roll-out so we are staging it. Today we will be releasing the new products (and the new website) in English and French. Over the next 10 days or so, we will be releasing the products and website in additional languages (German, French, Spanish, Portuguese, Czech, Russian, Polish, Chinese, Japanese, and possibly Korean, and Arabic). Other languages will then be added as we have them available.

Three products (Free Antivirus, Pro Antivirus, and Internet Security) and a new website are being released today. Even though we have expanded our product portfolio, our philosophy of having and promoting a top-notch free antivirus is paramount. This philosophy has enabled us to achieve 100 million users and we are continuing it. As you read through our new website and launch information, you will see that not only is the new free product easier to use and more visually appealing than the old product, it provides even more security protection. And it is still free and free from annoying pop-ups and requests for money.

These products are not minor updates from the existing products. They are all new. Some of the changes—such as the new user interface—are obvious. Some are not obvious at all (such as the new scanning engine). All-in-all we think they are a vast improvement from the current products—modern, light, fast, and very effective. For details, see the product detail pages on the new website.

  1. Avast! Free Antivirus. This is our new flagship product and replaces Avast Home Edition (we changed the name to emphasize the product is free). We focus this product on users that use the internet for web browsing and email. If that is what you do on the internet, this is the product you need. We are very proud of this product and we stack it up against anyone else’s paid antivirus—in fact, we have recently started submitting this product in lieu of our paid products to all of the industry standard tests. Virus Bulletin, one of the most respected journals, recently called this product “….nothing short of a miracle” (see separate blog post). Google selected this product for incorporation in many of their Google Packs. You can download this product here:
  2. Avast! Internet Security. This is our brand-new product and is focused on users that do on-line banking or shopping or that have sensitive data on their computer. We believe that these users need some extra layers of protection and developed this product to provide three more layers. This product takes the free antivirus and adds a 2-way silent firewall, a sandbox, and anti-spam. The firewall ensures that only trusted applications are able to receive or send data across the internet. The sandbox provides a means of executing your browser (or any other application) in a protected environment—thus even if you get infected, the infection does not leave the sandbox and does not harm your computer. And the anti-spam helps you get rid of all that irritating email you receive every day. And, we have made this product attractive to consumer users—a single license can be used on 3 computers in your household. This link will take you to the product and download page:
  3. Avast! Pro Antivirus. This is the update to the old Professional Edition. We focus this product on individuals that want to customize their security and on businesses. It is the same as Internet Security but without the firewall or anti-spam. This allows world-class security using your own personal choice of firewall and anti-spam. Here is how to get this product:

To support these products, there is also a brand new website. Today the website will only be available in English and French. But, as the other languages roll out, the language-specific websites will also.

If you are using a 4.8 product (home or professional editions), the update is pretty painless.  Sometime in the near future, the 4.8 product will tell you version 5.0 is available.  You will have the choice of a free upgrade or a special existing-user offer for the new Internet Security. All you have to do is click which option you want, and you will be upgraded. As we have about 100 million users, these messages will take a month or two to get to all users. If you don’t want to wait for this automated message, you can manually upgrade and get the same special offers by clicking on the homepage banner that asks if you are already a 4.8 user.

As you can imagine, it was a massive effort to release three new products and a new website at the same time. All of our teams have done a great job in making this happen. Development of course developed the new products. But many other teams were also involved—virus lab and research, localization and translation, website development, on-line store, and marketing.

If you are reading this at launch time, we will think of you as we celebrate with the Czech national drink……

  1. anower hossain
    January 31st, 2010 at 19:34 | #1


  2. Tapan
    January 31st, 2010 at 22:07 | #2

    I would like avast 5.0

  3. Robin
    January 31st, 2010 at 23:54 | #3

    I tried to download the latest avast version. my 4.8 version went away and now i have no avast on my computer that i can find. when i try to download the 5.0 i get a message telling me to delete the Beat version and try again. I can’t find avast in programs . now i have nothing. what do i do? i have windows XP

  4. Tarique Aziz
    February 1st, 2010 at 00:49 | #4

    Avast is vary good.

  5. Nick
    February 1st, 2010 at 03:49 | #5

    What I’m guessing is that the fuzzy logic has improved, and that it no longer has false positives like that.

  6. kite
    February 1st, 2010 at 04:42 | #6

    Took great courage yesterday to re-install Avast 5.0, this time with the 396 update. Happy to say computer is still up and running after 15 hours, WITHOUT any bsod thus far …… Hope this keeps up …… A word of appreciation for all the technical experts at AVAST for taking swift action to fix the bugs and to restore some measure of confidence into guys like myself, who wish to remain supportive of Avast. New version is intuitively easier to use and I noticed the number of processes up and running has decreased by at least 3, compared to Avast 4.8, which is a great improvement. A word of thanks, especially for encouraging me to try Avast 5.0 again after the initial disappointment. Please keep it up!

  7. February 1st, 2010 at 06:48 | #7

    Thanks for evrey thing !!!!

  8. koustav chakraborty
    February 1st, 2010 at 07:35 | #8


  9. February 1st, 2010 at 07:42 | #9

    quero baixar o avast mais recente

  10. rika dian h
    February 1st, 2010 at 08:00 | #10

    avast is the best

  11. Mlion
    February 1st, 2010 at 08:07 | #11

    Very useful to us.

  12. 345
    February 1st, 2010 at 09:37 | #12


  13. dj max
    February 1st, 2010 at 09:56 | #13

    Avast is the Best & Very Useful .

  14. February 1st, 2010 at 10:53 | #14

    you can remove avast leftovers by this tools:

  15. Jen
    February 1st, 2010 at 11:17 | #15

    As with any new software, there are always bugs. I’m going to wait a month or so until I feel it’s been out there long enough to upgrade to v5 =) just saying.

  16. February 1st, 2010 at 12:22 | #16

    You guys were great !!!!!
    Thank you for voatre efforts to protect our computers!

  17. Rakibul Hasan
    February 1st, 2010 at 12:48 | #17

    Thanks for evrey thing !!!!

  18. Ivan_from_Russia
    February 1st, 2010 at 15:59 | #18

    it keeps even from hmmm..

  19. clato josehp costa
    February 1st, 2010 at 16:50 | #19

    its good

  20. Sujo Philipose
    February 1st, 2010 at 17:47 | #20

    I am using Thunderbird 3.0.1 configured for gmail. Before upgrading to Avast 5.0.396, I was able to access my gmail account from Thunderbird (IMAP). I had configured Avast to scan my incoming and outgoing mail by setting “connection security” to “None” in Thunderbird and entering port number 993 in settings->Troubleshooting->mail->IMAP port(s). and port 465 in settings->Troubleshooting->mail->SMTP port(s). After upgrading to Avast version 5.0.396 it does not work.

  21. L A Graham
    February 1st, 2010 at 20:24 | #21

    @Robin Search for the Avast uninstaller and run that, then reinstall the new program.

  22. Steve M
    February 1st, 2010 at 20:33 | #22

    Nope, sorry! – Tried version 5 and when it kept BSOD both mine and friends laptop, i’ve uninstalled it and gone back to AVG. It’s sloppy testing and rushing it out the door which has caused these problems, and Avast won’t recover from this. Remember ZoneAlarm when they done the same thing? Shame, was looking forward to using Avast!

  23. February 1st, 2010 at 21:25 | #23

    @Steve M
    Sorry for the problem Steve. Was not a result of rushing or sloppiness. We had about 1 million beta testers–on top of a lot of internal testing. But we did hit some new configurations on the general release. The BSOD issues should be solved in the 398 release which went out last week. Were you using that release or the original release?

  24. Tarafa
    February 1st, 2010 at 21:37 | #24

    I cant run avast 5.0 in my computer i dont knew why ?
    can you helpe me?
    i have vista

    i like avast
    thank you

  25. February 1st, 2010 at 23:14 | #25

    how to install new version

  26. February 2nd, 2010 at 01:10 | #26

    Merci pour cette nouvelle version d’avast.

  27. Sasa
    February 2nd, 2010 at 02:10 | #27

    I wish to thank alwil for this complete free antivirus.

  28. dzen
    February 2nd, 2010 at 02:54 | #28

    спасибо, ребята, что делаете бесплатные и классные антивирусы!

  29. leo
    February 2nd, 2010 at 05:12 | #29

    avast 5 is good.i would like it .thx

  30. tracy hadley
    February 2nd, 2010 at 07:29 | #30

    none it’s all good

  31. February 2nd, 2010 at 09:39 | #31

    Avast Anti virus is best Anti virus for my PC.

  32. Sugar
    February 2nd, 2010 at 11:34 | #32

    Yup… in order to use Windows live mail, i had to disable the email resident scanner as it would not allow live mail to fetch Gmail emails… it is is for Gmail setup as an IMAP protocol. none of my other emails are affected…. for some reason the email resident scanned hates gmail…

  33. Apurbo
    February 2nd, 2010 at 13:18 | #33

    AVAST Product is very good.

  34. February 2nd, 2010 at 16:08 | #34


    I’ve gone through all the pages of this thread and read every message where someone had faced a problem after installation. ‘Such’ problems should never have struck if a product like AIS5 had been tested by 1 million beta-testers and Avast’s own technical crew!

    I don’t know how many beta versions had been put up for testing, but in my experience such bugs appear only during beta-testing AND not after announcing a ‘major launch’ of a new version!

    I’ve in the past tried almost all internet security products (after their launch) BUT never experienced problems such the ones I’ve had with AIS5 (or the ones others had with it).

    You may have to agree with company policy that it was not a matter of rushing the new version out in January but with my 17 years of professional experience in planning, product development & marketing (services industry), this was a no-no!

    All the money that Avast may have put into marketing efforts may not give the targeted dividend.

    I feel that I have the right to express myself because of (1) I always respected the accolades received by Avast from independent testing sources and sites claiming 4.8 to be the best, (2) the 100 million registrations (how many are still using it?) and (3) my effort to download AIS5 based upon the perception that had been in my mind and image of Avast in general.

    But as you know, one wrong move and it can all turn out to be another ‘Vista’ story.

    Perhaps I’m exaggerating BUT trying out AIS5 or recommending it is not on my priority list.

    PS. This is what you had quoted earlier on this page “Were you using that release or the original release?” Seriously and with all due respect to the Avast team, a better PR tactic could have been deployed instead of this line.

  35. Petr Bucek
    February 2nd, 2010 at 16:24 | #35

    @aly tahmasdby
    Hello Aly,

    When you see orange avast! icon in your system tray, program is running
    promptly. Check your license key validity. You can find this information in the Main screen under the Current status.
    If it is not displayed, click on “Show details”.

    In case that you are not sure about the current statement of avast!, check avast! resident shields from the user interface.

  36. Petr Bucek
    February 2nd, 2010 at 16:26 | #36


    You can already download the new full version of avast! 5 Free Antivirus from our web pages:

    If your current status is “NOT YET REGISTERED”, you will be prompted to fill our registration form and register.

    Click on Registration in the MAINTENANCE tab, from where you can review all your current information. If you are connected to the internet, click on “Register now” button. Fill in all required and/or details, that you want to put there including “Please let us know” section and continue clicking on “Register for free license” button. Status will automatically change to “REGISTERED”.

  37. Petr Bucek
    February 2nd, 2010 at 16:34 | #37


    All sounds can be configured from the avast! Settings – Sounds. Click on “Configure” button and set it up according to your needs. Just double-click orange a ball icon in your system tray, choose “Settings” up on the right side of the screen and click on “Sounds” on the left side.

    You can also find all sound files manually in this folder:

    C:\Documents and Settings\All Users\Aplications data\Alwil Software\Avast5\sounds

    With Kind Regards,

  38. Petr Bucek
    February 2nd, 2010 at 16:42 | #38

    Hello Robin,

    Try to reinstall the program, please.

    If you would like to uninstall avast! from your computer, I recommend you to follow these steps:

    1. Uninstall avast! via Control Panel – Add or Remove programs. If it does not work, use our
    uninstall utility – download it from (this is more reliable
    than the Add/Remove Programs applet). In this case you have to Disable avast! self-defense module in avast Settings
    - troubleshooting.
    2. Restart the computer.

    Then download our latest version 5 avast! Free antivirus

    It can be downloaded from here:

    If your current status is “NOT YET REGISTERED”, you will be prompted to fill our registration form and register.
    Click on Registration in the MAINTENANCE tab, from where you can review all your current information. If you are connected to the internet, click on “Register now” button. Fill in all required and/or details, that you want to put there including “Please let us know” section and continue clicking on “Register for free license button”. Status will automatically change to “REGISTERED”.

    Warm Regards,

  39. Petr Bucek
    February 2nd, 2010 at 16:49 | #39

    @Sujo Philipose
    Hello Sujo,

    This problem concerns the new avast! 5 feature- the possibility of ssl/tsl encryption.

    avast! 5 already supports the ssl / tsl encryption, but you have to turn it off in your email client first (it cannot be turned on in both – email client and antivirus program). More information can be found here:


  40. Petr Bucek
    February 2nd, 2010 at 16:55 | #40


    Thank you for all your comments. I have just put several answers here, but it would be much more efficient to ask us technical questions directly through our support portal. Please take advantage of or

    Again thanks and enjoy the new interface and features of avast! 5

  41. February 2nd, 2010 at 17:22 | #41

    can you please give us more details (avast version, browser, screenshot of problem) as we do not see it as being blocked, all please to

  42. dillu
    February 2nd, 2010 at 21:13 | #42

    In previous version 4.8, I used to utilize ashQuick.exe for scanning automatically when a file is downloaded through Download Accelerator Plus(DAP) as DAP contains the relevant option. This is very useful feature and was well supported by the ashQuick.exe of avast4.8.
    But in the present version 5.0.377or396, though ashQuick.exe is available, the samething hasn’t fulfilled. Moreover, scan using context menu invokes ashQuick.exe in the earlier version 4.8; but in v 5.0 scan using context menu invokes a userinteface named scan. Please let me know how to solve this.

    February 2nd, 2010 at 23:36 | #43


  44. bokah
    February 3rd, 2010 at 01:11 | #44

    hopefully 64bit boot time scan is coming soon

  45. February 3rd, 2010 at 03:22 | #45

    i hope the product is free !! ^_^

  46. Mr.Hero
    February 3rd, 2010 at 07:26 | #46

    I love this softwave anti-virus. Thanks for evrey thing……….

  47. ramjade
  48. Vikas Khanna
    February 3rd, 2010 at 10:40 | #48

    Dear Sir

    For the past one continuously i have been trying to buy your AV Pro 5.0 but the web page to make the purchase doesn’t loads and it shows an error stating either the web page is under maintenance or had moved to some other web site. Pl advise how to proceed further as my system needs a good AV and i don’t want to install some other AV.



  49. kurdistan
    February 3rd, 2010 at 12:09 | #49

    hello thank you for avast cast.
    I’am from kurdistan in sulimany [iraq].
    this avast new veersun it very well , but i kan’t get the key avast 5.
    thank for your if you can to sent to me to may E-mail: .
    I’am very happy to avast new versun.
    did you enter the Kurdish language in to your avast sait(
    thank you again

  50. erry
    February 3rd, 2010 at 14:57 | #50

    im back to avast … this my AV choice

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