IMHO - I would replace AVG with AVAST Free - Many have pointed out you can only have one AV software running safely - Some Firewall Apps overlap AV
software so make sure you disabel the AV area of any firewall "COMODO" is great example of this.
Make sure there is no MS AV product running - Might have to kill this is services and disable.
Download "Malwarebytes" and run it - This one is really good to have if your pc is already infected, most AV software struggle with the removal
portion of a Virus.
Little Registry Cleaner is a effictive GNU reg cleaner, however I have never seen one product / at least one Free Product remove all the errors - I
usually run Little Registry Cleaner and Glary Utilities.
OLE Clean will clean out / remove a lot of missed PIDs and interface issues.
All of the above are free.
I recently had a major issue with a recent MS update for XP SP3 - To be honest I never could nail it down the exact update but the issues consumed a
few day to resolve - The update wiped out my wife's HP Laser Jet P2025dn driver and I could not get it reinstalled - It also wiped out ATI Catalyst -
In the end I removed all recent updates from MS through the Add and Remove panel in CP - The suspect updates were Net Framework version but I
uninstalled all the recent updates.
Which ever path you choose and there are many suggested here, formatting and reinstalling would be my last option, in-fact I would install windows in
a new dir and then move everything over from the corrupt one, before I would go down the road of wiping the drive.
In a nut shell clean the registry with two recommended cleaners, then reboot.
Remove any recent MS updates that suspiciously coincide with your trouble, then reboot.
Tell Scandisk to run on the next reboot and choose test for bad sectors, then reboot.
See if any of the above help, reboot into safe mode and see if this helps. If safemode does not show any improvement then do the AV recommendations
above. Reboot after every un-install. I would grab "Malwarebytes" and load it up and update then run a full scan before removing anything else.
Avast IMO is a better then AVG.
If you do all these things and still have problems in safe mode, I would install a second copy of windows on the same drive next to the existing
windows installation and see if issues are there, if they are not then think about wiping and installing all over again - If they are still there then
think hardware and the CPU thermal compound is one that comes to mind, but this has already been pointed out.
Maybe increase the swap file size to 4GB since you should really have 2 GB min with XP - Note if you have to replace the Mem think (2 x 2GB) modules =
4 GB that way if XP will have somewhere around 3.4 GB of Mem to use.
A thought maybe your video adapter is using shared memory - This would be set in the bios - have a look and reduce the amount of mem it is
Be sure to have pen and paper at hand to document your steps as it can get confusing.
Good Luck, You will fix it and once you do at the least create a system restore point and back up the reg some where safe.
Here is a handy app to grab all the XP updates from MS and store them locally so you do not have to go through the painful process of updating off MS
site. It is nice to have all updates to a recent date near by.
edit on 23-7-2011 by thomas007 because: (no reason given)