A neighbor asked me to clean her pc & I said ok. I saw it had AVG on it so I used REVO to uninstall it but after that I saw an AVG icon in the notification & moused over it & it said it was updating. So I came in here & got this http://www.techspot.com/downloads/5377-avg-antivirus-uninstall.html followed what it said to the letter & it quickly rebooted. I logged back in & the screen went black & all I can see is a cursor that is movable.After waiting several minutes & nothing happened, I powered it off,waited a bit & powered back up & the screen came up with choices & Start Windows Normally was highlighted so I tapped enter , logged in & still the black screen with a movable cursor. What did I do wrong? Or is it working in the back ground? Its an ACER desktop Vista Business & thats all I know about it at this point. I hope you have good news.