It's not Fast User Switching that's causing the crash. Fast User Switching is off on my WinXP Pro box because I login to a domain controller (Win2K).

This happens *EVERY* time I lock the system or the screensaver kicks in & locks. This has been happening at least as far back as Xolox 1.2x, although I can't recall the exact version on which it started happening.

I've completely uninstalled & reinstalled with no difference.

The "XoloX problem report" reads as follows:

"XoloX has encountered a problem and needs to close. We are sorry for the inconvenience.

Your searches will be lost. If you started some downloads recently, they may also be lost.

Please tell XoloX about the problem (so I am)

We have created an error report that you can send to help us improve XoloX. We will treat this report as confidential and anonymous. Bug report data is shown below.

HMODULE: 4194304
Unhandled exception EOSError
Exception message:A call to an OS function failed
Call stack:"

There's never anything in the call stack.