[jipsi]

Hope someone can help me... it feels as if a virus is at work here, although scans have shown nothing out of the ordinary...
Out of the blue this morning, while doing a genealogy search at a site I visit almost every day, an error message popped up:
"Explorer has caused an error in ~7082808388.TMP. Explorer will now close. If you continue to experience problems, try restarting your computer."
If I click the window "X" or "Close" button, my computer just shuts down. When I restart it, a few moments after my desktop is loaded, the error message returns. I have found the referred-to file in my WINDOWS/TEMP directory, but cannot delete it because I get an error message saying it is being 'used'.
Also, when scanning for errors on my hard-drive (using Scan Disk from my Norton Tools), I get a message saying it has tried 10 times to start the scan, but cannot because I haven't quit all 'running programs', that a file is continuing to write to my disk...
HELP?

Important note: I can still navigate around on my computer, although the error message window is still in front. So it seems to be a 'fake' error message? How do I get it to stop, or better, how do I remove whatever file (the referred TMP file?) without getting an error message?
I'm pretty much a newbie when it comes to troubleshooting of this kind...