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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: catilley1092 on July 13, 2011, 03:45:02 AM

Title: Why does Avast Internet Security slow XP to a crawl?
Post by: catilley1092 on July 13, 2011, 03:45:02 AM

I've been using Avast Free since 2006 as my main AV solution, along with MBAM & SAS as backup scanners. Also use free Comodo Backup. Haven't had any problems. Until I accepted the 3PC for $29.99 Avast IS last week.

On Windows 7 & Vista, it runs fine. But on XP Media Center, it was slowed to a crawl, taking 10+ minutes to boot & all icons on screen. Even then, it takes 2 minutes to open any of my browsers, and about the same to open a file on a flash drive. When I disable protection, the machine runs normal. I don't understand it. I removed Avast Free, and used the free tool from the Avast site to check and make sure all files were removed.

So I uninstalled Avast IS & reinstalled it, same result. Except for the Mail, I've left the settings as is. As I've already stated, Avast IS runs fine on Vista & Win 7. But XP Media Center is my main OS, so I need the IS to perform. If it were Vista, I wouldn't care.

My computer is a HP MS214 AIO, 1.5GHz Athlon X2 3250e, 4GB DDR2 Crucial RAM, 1TB WD Caviar Black 7200 RPM. Tri Boots XP Media Center x32, Vista Ultimate SP2 x64, Windows 7 Pro x64. I'm a typical home user, using my computer mainly for web browsing, forum visiting, making transactions, etc. Except when using XP Mode, the PC is under little strain.

Any suggestions?

Cat

Title: Re: Why does Avast Internet Security slow XP to a crawl?
Post by: DavidR on July 13, 2011, 04:18:14 AM

I would suggest that you try a clean install of AIS:
- Download the latest version of avast, 6.0.1203 http://files.avast.com/iavs5x/setup_ais.exe (http://files.avast.com/iavs5x/setup_ais.exe) and save it to your HDD, somewhere you can find it again (if you didn't save your last download). Use that when you reinstall.

- Download the avast! Uninstall Utility, aswClear.exe find it here (http://www.avast.com/uninstall-utility) and save it to your HDD (it has uninstall tools for both 5.x and 6.0.x).

• 1. Now uninstall avast! (using add remove programs, if you can't do that start from the next step), reboot.
• 2. run the avast! Uninstall Utility from safe mode, first for 5.x if previously installed and then for 6.0, once complete reboot into normal mode.
• 3. install the latest version, reboot.

Title: Re: Why does Avast Internet Security slow XP to a crawl?
Post by: jvidal on July 13, 2011, 04:48:32 AM

Are you sure there are no other AVs running?
If I were you, I would remove SAS & MBAM as well and start re-installing one by one. I still wouldn't recommend any on-access scanners, be them Antivirus or Antispyware besides Avast (or any AV, for that matter).

Title: Re: Why does Avast Internet Security slow XP to a crawl?
Post by: RejZoR on July 13, 2011, 08:06:59 AM

Do you happen to use Raxco PerfectDisk 12 defragmentation program on that WinXP system?