I just posted this - perhaps you also know what's likely to be causing this?
I own a Dell Vostro 200. Pentium Dual E2160 - 1.8 ghz - 1GB memory. I've used this PC using WinXP SP2 for about 4 years now with absolutely no problems. On July 21 I installed AVS4U DVD playing software. Aug 29 2011 a Skype upgrade (but I do not have either of these programs open at night). Maybe something they run in the background is causing this problem? However this problem started at least one month ago, before the skype upgrade, unless there was an earlier one I don't recall.
I reboot the PC to clear cache when I leave - and leave PC on at night (with monitor off) so when necessary I can remote login with logmein.com. I have no programs running except those in startup which would only be logmein, avast and whatever windows runs in the background.
For the past month or so, I notice the following.
If I login the first night, no problems.
But on the weekends, when it's been more than 24 hours since my last reboot, my pc cannot be remote accessed. Either it displays in my logmein dashboard as being available to me but when I log in it disconnects OR it displays as offline.
When I arrive Monday moring, the pc either already displays error windows or does so as soon as I try to start a program. Sometimes the syst tray and time icons, or even the start button, become solid blue. I must reboot to do anything. Today I had to reboot twice before I could operate normally.
The error windows I see are a generic error - something like it cannot open the program.
As it occurs after the PC is on for more than 24 hours - is something that is running causing it to lockup like this?
Thanks for your help.