Good afternoon...I am having a problem with some programs in my computer...First of all my Windows live messenger can't signed in and when i am trying to uninstall it, it appears a window telling me that because of <<hr:0x80070643>> we cannot continue...also i cannot install the lavasoft'a ad-aware program to search for any trojan...i scanned my computer with the avg but it doesn't found any problem...if anyone knows how i can solve this problem please let me know...thanks!