I had to reboot

Windows XP Pro.
Intel 6300 core2duo.
Applications running (that i know): Logitech web cam, PeerGardian,Emule,Skype,Avast AV, AVG Antispyware (maybe that is the cause?),Virtual Deamon Manager, Apc PoweChute,SQL Server manager,Sony cell manager.

The problem: While in IE 7 and browsing, i couldn’t CLOSE ANY window. Every window i opened, it can’t be closed. I had to Reboot.

Thanks

ps: the AVG Antispyware was not in realtime scan mode since it is a evaluation version.