Download a new msconfig.exe file
here. Make sure you put it in the correct folder (C:\WINDOWS\System).
Afterwards, download
HijackThis. Unzip it to a permanent location (not in a temp folder). Run a scan (but
do not fix anything), and save the log file. Copy and paste the log file, along with your problem, into a new thread on the
HijackThis Log Help Forum (not this forum). The analysts will scan your log file to check for any malicious programs running on your system (viruses, trojans, worms, spyware, etc). If anything is found, they will provide you with steps to thoroughly cleanse your computer.