In the last couple of weeks I've noticed that my computer is crashing during startup after loading the desktop (XP/SP3). There is momentarily a blue DOS screen with text, including the error message, but too brief to read or record, then the computer restarts. Sometimes this cycle happens once, more often twice, then it completes startup and everything seems to run ok until next time.
I can't say that I know exactly when it started, since I usually walk away during startup. I first noticed it after installing Malwarebytes Anti-Malware free (nonresident) and thought it was a conflict between that and Spybot free resident, tho it didn't make much sense to me why a resident and nonresident program should collide at startup. After removing MBAM it seemed to stop, at least when I was watching, but perhaps that was random. In any event, after taking Spybot resident out of startup and installing SuperAntiSpyware Pro (resident), I noticed it occurring again. Two other things that are occuring, perhaps related, are that 1) with the Bresnan Communications online chat (my ISP), after sending the initial message to start, I get a disconnected error when trying to send again after their reply. It takes starting in Safe mode to make it work (no crashes in Safe mode). And 2) When shutting down the computer, Mailwasher free gives a pointer error (closing MW itself gives no error) . This seemed to start some weeks back after a registry edit to get rid of all evidence of Real Player.
I'd be grateful if anyone could suggest how to approach solving the startup problem. I've run anti virus and anti malware scans, but haven't come up with anything related. I've also read about boot logging (F8), but when I did it there was no ntblog.txt file to be found. Here's a list of apps, all current, that load at startup and show icons in the Notification tray (lower right):
Comodo PF free
Comodo BOC Clean
Realtek audio manager
MSI PC Alert