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What’s a good free antivirus program that will not slow down my computer ?

I use windows XP still. I know AG has a free version but it seems to slow my computer down. I’m not ready to upgrade to Vista yet. Tried it and like XP better.

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14 Responses to “What’s a good free antivirus program that will not slow down my computer ?”

  1. Brood619 said :

    Well, the only other one I know with a free version is Avast!, and it’s is supposed to be pretty good, for a free version.

  2. Abaria Bateman said :

    Avast anti-virus. Its is free fast and does the job!

  3. tl6768 said :

    Avira and AVG are the 2 best free anti-virus programs. You could try freeing up System resources to help relive the slowdown. They both shouldn’t slow your system down unless they are scanning, in which most will when scanning and surfing at the same time.

    Unless you have an amzing processor

  4. bert_beer said :

    this has proven to be better than AVG,norton ,avria

  5. zoomjet said :

    Microsoft Security Essentials – includes antivirus and antispyware protection and is light on resources

    use it in conjunction with spywareblaster (free)

  6. davies said :

    Microsoft Security Essentials has good detection rates, in particular detecting rootkits. Even more impressive is that Security Essentials has very few false positives, is light on resources and is good at removal of existing malware.

    Avast! Free Antivirus is also an excellent free antivirus that many users prefer. Its detection rates is on par with AntiVir. Avast has the most features, with full real-time capabilities, including web, e-mail, IM, P2P and network shields, boot-time scanning, and a behavioural blocker. Avast is light on resources.

    Avira AntiVir Personal Edition is my top pick for the best free antivirus software if you’re looking for the best protection against virus, spyware and rootkit threats. AntiVir is very light on resources and the detection rate of malware is outstanding, better than almost every other antivirus according to tests. However, there are some reservations.

  7. Kristelle said :

    Avira, Its nice, it gives you Alerts and warnings and its Free! that’s what I’m using right now! hope that helps! 🙂 and It is also fast and easy to use!

  8. Celestine said :

    When it comes to Computer safety and security, I would suggest checking out the following:


    Remember to always keep your antivirus and anti-spyware applications up to date and fully functional.

    Feel free to check out the free trial version of Kaspersky here:

    Good luck!

  9. Adin said :

    Avira is the fastest and has the best detection rate.

  10. TheArfen said :

    panda cloud is the lightest you can get.


  11. Tony RB said :

    How much memory does your XP computer have? If you have less than 1 gigabyte, all anti-virus programs will slow you down, as they need “room” for their program code. Not enough RAM means the operating system has to swap code to the hard drive’s paging file and that is what usually slows computers down.

    Sounds like you are looking for a free real-time anti-virus. There are very few of these, most of the free antivirus programs are only on-demand scanners. Malwarebytes’ AntiMalware, for example, has the on-demand scanner free, but the real-time is a pay-for.

    Microsoft Security Essentials is free. I am using it right now. Because I ran the computer with no anti-virus before, I could tell there was a slowdown. It’s because the software scans each webpage looking for malicious JavaScript and other script – and it’s caught three of them (last month).

    You can also consider booting your computer with an anti-virus that has its own operating system, this too is only an on-demand scanner (and since it takes at least 40 minutes to do a full scan, you don’t run it frequently.)

    Two of these are:


    You can create a “Rescue CD” with AVG anti-virus software:
    AVG Offers Free Emergency Boot CD
    Carrie-Ann Skinner
    Mar 25, 2010 9:46 am

    The link:
    AVG Rescue CD
    A powerful toolset for rescue & repair of infected machines.


    You can create a “Rescue CD” with F-Secure anti-virus software:
    The Cleanest Malware Scan
    Lincoln Spector
    Apr 5, 2010 8:47 am

    The link:
    Boot Up Securely with the Rescue CD


    Using another computer, you download the ISO image. The file is not very large and downloads fast on broadband like DSL and cable. Then you burn the ISO image to a CD; most computers have software with their DVD/CD drives that can do this specialized burn.

    If you download both of these, each ISO image must be burned to a separate CD.

    Then you boot your computer with this disk. Since Windows does not run, any virus or spyware or trojans or crimeware or keyloggers or other malicious software called malware cannot run and take control of your computer.

    This is a Linux-type set of programs, and it does not give you a pretty interface – it’s all text and you will have to use the keyboard to select what operations to do.


    Be aware that if these programs find and remove or quarantine malicious files, you might not be able to boot your computer into Windows; some malware corrupts essential Windows files to be able to gain control of the computer.


    The advantage to this type of anti-virus scanning is that since Windows does not start, any malware on your computer cannot take control. Many computers get more than one malware program installed on them; an anti-virus program like one of these two allows you to remove some of those malware programs and makes it easier for other anti-malware programs to remove the others.

    It’s a never-ending battle.

    Tuesday, April 13, 2010 at 4:25 pm CDT

  12. Wason said :

    Avast 5
    Avast offers a really solid protection against threats. It has protection against anti-spyware & anti root-kit. Using it’s Web Shield the computer is protected against browser hijacks blocking access of hijacked websites. also features a heuristics engine and a Gaming Silent mode. The Mail Shield protects the computer from infected email messages, while it’s Instant Messaging Shield protects the system from IM threats. It supports a lot of IM clients like Windows Live Messenger, AOL, ICQ, Yahoo Messenger and others. Another great feature is the Peer-to-Peer Shield, which scans all the files downloaded with P2P clients. Some of the supported clients are: LimeWire, Ares, DC, BitLord. Avast has a Behavioral Shield which monitors the system for any suspicious behavior, and it’s Network Shield monitors the network activity in order to stop virus from infecting the system.

  13. Ol'grizzler said :

    Just personal opinion of course. I use Avast , I have also got superantispyware and Malwarebytes. I recently changed to Comodo firewall which seems fine and I seem to boot up quicker. They are all free for personal use and I have had no trouble with Viruses Trojans Hackers etc. I also use Windows Defender from the Microsoft site. It is safe to use two anti-spy products but never use more than one A/V as it can cause conflicts. You should run A/V and anti spy weekly.
    Download safely from`105//1/file-association-fixes-vista.html.

  14. Nicole said :

    Check out Immunet Protect (– the software is very lightweight (less than 5MB), so it won’t slow your computer down.

    I also like that you can run it side by side with other AV software.


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