Hotmail Access

Until recently I had no problem accessing my HOTMAIL account but now I get the following message:Microsoft Visual C++/ Runtime Library/Buffer Overrun Detected//A buffer overrun has been detected which has corrupted the Program's internal state.The Program cannot safely continue execution and must now be terminated.I use Avant Browser mostly but I get the same message when I try to access HOTMAIL thru Mozilla.Please help me solve this problem and access HOTMAIL.Many thanks