Posted 13 June 2011 - 09:15 AM
Have you run a full scan with your anti virus app? If not, please do so. Then, assuming it's not malware, you can try to isolate the issue with msconfig:
Open msconfig and on the General tab choose "selective startup" (uncheck all three items) and reboot. Does the problem still occur? If not, start adding items back to msconfig one or two at a time, rebooting after each change, until the problem reappears and you'll have identified the offending process. This is clearly a time consuming procedure, but it is the best way to determine if some process loading with the system is the cause of your problem.