1. Download, and install Unlocker: http://ccollomb.free.fr/unlocker/ Restart computer. It'll install under right click menu. Open Windows Explorer. Navigate to offending folder/file. Right click on a folder/file. Click Unlocker Select Delete from drop-down menu: Click OK. A folder/file will refuse to be deleted, but Unlocker will give you an option to delete on reboot: Click Yes. Restart computer. ============================================================== If the above doesn't work, try... LockHunter: http://lockhunter.com/ FileASSASSIN: http://www.snapfiles.com/get/fileassassin.html 2. Safely yes. 3. See, if same problem exist in Safe Mode with Networking 4. Post exact message, a screenshot maybe? 5. Explain more, please 6. Never update non-MS drivers through Windows updates. Often, it's a disaster. Hide that update. If your video is fine, leave the driver alone. If something wrong, go to nVidia site for an update.