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Ask Slashdot: Light-Footprint Antivirus For Windows XP?

New submitter Bauermlb writes "I service computers for retired folks in my community, often older machines with modest speed (2 GHz Centron) and modest memory (512 MB). Adding AVAST to one of these machines slows it to a crawl. Any recommendations for a light-duty antivirus program with a low overhead? (These people do not tend to surf 'dirty' sites.)"

14 of 294 comments (clear)

  1. Hah by J'raxis · · Score: 4, Funny

    (These people do not tend to surf 'dirty' sites.)

    That's what they tell you, eh?

  2. all sites are dirty sites by Rosyna · · Score: 4, Insightful

    Ad networks/common popular websites have been compromised repeatedly in the past and will be compromised repeatedly in the future. All sites could be considered "dirty sites".

  3. No such animal by dreamchaser · · Score: 4, Informative

    There is no such thing as a safe website. These days any site can wind up hosting malware via banner ads that inject code.

    AVG is relatively lightweight but I would suggest you test it and others on some of your target hardware.

  4. Microsoft Security Essentials by Anonymous Coward · · Score: 5, Informative

    I've seen way better performance with it than with McAfee, Avast, etc.

    Detection benchmarks typically put it on par with the other free solutions, though it changes from month to month.

  5. Obligatory Linux evangelism by Curupira · · Score: 4, Insightful

    Do they *really* need Windows? Or would a lightweight distro with a windows-like interface do the job? Just asking :)

    1. Re:Obligatory Linux evangelism by SirTicksAlot · · Score: 5, Funny

      When you say the word "Linux", many assume it's hard, weird or too different.

      It's a retirement community; when you say the word "Computer", many assume it's hard, weird or too different.

    2. Re:Obligatory Linux evangelism by Anonymous Coward · · Score: 4, Insightful

      This.

      A simple sylogism:

      Any antivirus solution worth its salt will put a hook in the file open system call to scan each file as it is accessed.

      Regardless of the footprint and efficiency of the program, anything that runs each accessed file through an additional filter will incur a significant performance hit.

      Therefore, any antivirus solution worth its salt will incur a significant performance hit.

      The solution is not to install an antivirus program. Ways to deal with potential virus infestations: (1) run with adblockers, noscript, and perfectly strict browsing discipline, or (2) don't use a virus-prone system, or (3) something else?

      I do (1) and (2). What will do you?

  6. Avira? by kinarduk · · Score: 4, Informative
  7. Microsoft Security Essentials by Toshito · · Score: 5, Insightful

    I've been using it for the last 3 years on XP and now 7, very lightweight. No virus or adware problem (for now). From time to time I also scan my computer with adaware and spybot.

    --
    Try it! Library of Babel
  8. End Of Life by kelarius · · Score: 5, Informative

    Microsoft is killing updates for XP in a little under 9 months. Get them onto linux or a new PC or it may not matter how good of an antivirus you put on there after that.

    --
    Personally I'd rather have my idiots at home glued to the TV than out doing idiotic things
  9. "I want an elephant the size of a mouse, please" by tlambert · · Score: 4, Insightful

    "I want an elephant the size of a mouse, please"

    Antivirus software sniffs the butt of ever filesystem write operation, as well as sniffing the but of every executable image load, as well as every browser plugin load; it also scans the contents of inbound network data, since it could have a known payload using an unknown zero day in the program requesting the data from the Internet.

    Most of the code could be made significantly less overhead, but we are talking reducing it from elephant sized to water buffalo sized, rather than reducing it to mouse size. For example, if instead of checking the whole file when every write occurs, it could prevent the file being opened again until a scan-on-close occurred. Both Outlook and IE would hate that, and any browser that didn't operate "stage then interpret" would still have to be byte-stream interposed. As another example, it could decide to not react to every FS event; MacOS has this capability, since it integrates a mandator access controls (MAC) capability, but many OSs do not. And even on MacOS, most AV vendors don't take advantage of this, since it messes with their ability to use the same event streaming model as on their other platforms.

    So: no such animal exists, if you want it to also be effective.

  10. Re:Clamwin by Bacon+Bits · · Score: 4, Insightful

    ClamWin is "light footprint" because it's no footprint. It has no on-access scanning, which for most people is indistinguishable from not having antivirus installed.

    --
    The road to tyranny has always been paved with claims of necessity.
  11. Re:How does this stuff get on Slashdot? by ZeroNullVoid · · Score: 4, Informative

    I think he is getting confused and meant to type Centrino which was, at sometime a marketing/branding term for an Intel Reference Design consisting of Chipset, CPU and Wifi. Either way, they wrote it wrong, but lurkers from the past would have recognized it. It was posted on a lot of laptop stickers in the same way Pentium 4, Core X, etc are.

    https://en.wikipedia.org/wiki/Centrino

    As for /. letting this through... things have changed, have you been gone for the past 3 years?

  12. Re:Clamwin by dildos_akimbo · · Score: 4, Funny

    I hear MyCleanPC will speed up your PC and protect you from your own hosts file. (ducks) (runs) (ducks some more)