Sounds like you're seeing a symptom of a nasty computer virus known as the Magistr Worm. There are several variations of this worm, which has been around for nearly a year and is usually spread through infected e-mail files.
What makes this particular virus such a headache is that it has been programmed to do its damage in a series of time-released doses. Instead of wreaking havoc all at once, which is more easily noticed by computer users, the Magistr does a little bit here and there.
A result is that new problems continue to unfold for months before you might realize your computer is infected.
For a more complete discussion of the kind of trouble this virus can cause, point your Web browser to http://security response.symantec.com/avcenter/venc/data/w32.magistr.24876@mm.html.
The trouble you're having with the "moving" icons usually appears after your computer has been infected for about two months. On odd days of the week, the virus causes the desktop icons to be repositioned whenever the mouse pointer approaches, giving the impression that the icons are "running away" from the pointer.
While this problem may sound almost whimsical, it's likely that by the time the virus reaches this stage, it has already done more serious damage, such as overwriting some files, changing the contents of some Word or text documents and sending infected e-mails to some people it has found in your e-mail program's address book.
To eradicate the virus, you'll need to install and run anti-virus software such as Norton Anti-Virus (www.symantec. com/product) or McAfee VirusScan (www.mcafee.com).