Usually it simply just freezes; where moving the mouse or ctrl+alt+del has no effect. But sometimes it also randomly reboots without me asking for it to do so. This all happens very randomly, sometimes after five minutes and sometimes it can run fine for several hours. It doesn't seem to matter what I'm doing either; I can be typing in Word or browsing the internet or not doing anything at all, the computer freezes no matter what.
I had this happen to me once before, a year or so ago. But that turned out to be because of a conflict between two installed versions of Windows. See, I had recently got a new computer and foolishly just moved over my old harddrive (that has Windows 98 installed on it) as a slave. I ended up having to reformat both harddrives and starting over from scratch, but the freezing problem was solved.
But now it's apparently returned and I have no idea what could be causing it this time. I know it's not the same problem as last, since I only have one installation of Windows (XP) now. And I haven't installed any new drivers or programs, or made any other major changes right before this started either.
I have tried system restore, reformatting my smaller harddrive, dusting out my computer and replacing the fan on my motherboard. But all with no results.
I've been trying to use the event log, but it hasn't been all that helpful. However, roughly 80% of the time the computer freezes it keeps reporting the same two things:
"The service Nsvpismal could not be started because of the following error: The file could not be found."
"The service Splsipnia could not be started because of the following error: The search-path could not be found."
Problem with that is that searching for "Nsvpismal" or "Splsipnia" on various search engines has given no results whatsoever. This sort of makes me think it could be a virus, the kind that has random names so that it'll be harder to identify (and thus remove) them. But since my virus program (AVG Free Edition) doesn't find anything, as well as a couple of other reasons, makes this seem not very likely.
Also, looking in the event log I saw that the computer created a minidump the last time the computer froze. I'm not a debugger in the least so I couldn't make much of it myself, but if it could be helpful to solving the problem, let me know and I'll try to post it.
This is really stressful, to say the least, I keep losing work and I can't really do much on the computer anymore simply out of fear that it'll end up lost anyways. And I'm out of ideas myself, so that's why I came to you guys. You've been really helpful in the past, so I have much faith that you will be able to solve this (or atleast give it a good try ).
Oh, and one last thing... Sorry if this is in the wrong forum; this could technically be a hardware problem, but since I'm personally leaning towards the fact that it has something to do with Windows XP, it ended up being posted here.
Thank you very much for reading, any and all help will be highly appreciated!