Accessed McAfee Security Center Window (cant remember why) and it was blank. Mcafee advised (badly) to uninstall and reinstall which proved to be a big mess. (I uninstalled Security center first, not last, then had to resort to manual uninstallation of other Mcafee features...Firewall, VirusScan and Privacy).  Reinstalled. Anyway, screen is still blank.  Then tried changing desktop settings and fonts.  Still blank.  Had a previous problem months ago where McAfee was creating some kind of graphics conflict with another program.  (When disabled McAfee, the display problem didnt exist)  Any chance this could be similar situation?  I am so disappointed in the help offered by McAfee and Dell tech support for the problem.  I also tried a system restore to a few days before i noticed the screen, and wound up with start-up errors re: McAfee software, so i reversed the restoration.  I'm talking too much. Help!