Posted 26 September 2010 - 07:48 PM
Thanks, Luis, so much for providing the additional resources for performing the memory test. The good/bad news is that memtest86 didn't find any RAM errors.
Going back to the blue screen reference to prismusb.sys, I was able to obtain a complete installation CD for the device associated with that driver. It's the wireless adaptor for the computer. I uninstalled and then reinstalled the device and driver. The blue screen is still occurring.
An important observation: The blue screen isn't happening just after Windows boots up, as before, but I can get it to happen automatically by launching Skype. That said, I uninstalled and reinstalled Skype. The blue screen occurred as soon as Skype opens a sign-in window. This is still the "first" sign-in window following the reinstallation, the one that asks the user to create a new password. The bad news is that my wife uses Skype on this computer for her long-distance music lessons. The next one will occur on Friday morning. Worse comes to worst, I'll set her up to use my laptop for her lessons until we get this problem fixed.
Anyway, any suggestions as to what I might try next?