[dolarene]

In the browser or competing all the computer?

If is in the browser, you must go to the config of that browser (duh) and check the thingy about rollovers (sorry, i don't use I.E. and in Firefox aren't rollovers)

If you got this issue in all the O.S. two things:

First, i suposse you use Win 4.0 or NT 5.0 :/ (AKA dumb 'n' dumber)

Second, from 2 years ago i don't see any BSOD i mean my Win skills are a bit rusted. but...

From the desktop click the secondary mouse button, you pop-up a menu, go to Preferences, then to Aspect or something (i don't know the english name) you find it like the tab with the color and fonts selection, click the advanced button, i think here you can find what you search. (Surely you switched the Windows theme to one with the blink enabled, simply disable it (maybe an option or a button)