When I try to access facebook or any PDF documents it says windows explorer has stopped working. It doesn't happen any other time. internet works fine other that that. I have vista, and have just downloaded avg anti virus free edition 2011. any idea what the problem could be?

If you problem appeared after the install of the AVG antivirus free edition 2011, I recommand to you to uninstall it and to check if the problem is solved or not. If yes then your antivirus is the cause of your issue. You can also perform a restore operation of your operating system using a restore point that dates before the appearance of your problem. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Hi, In addition, you can reset IE to clear temp files: Tools->internet options->advanced tab->Reset... Hope it helps. Regards,Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.