sac.exe is known to be a type of spyware. This file, and possibly others, are running in the background on your computer. Removing these files immediately is very important.

sac and 180SearchAssistant Spyware can cause major problems with the security of your computer, and need to be scanned and deleted. Spyware and adware can be very tricky. Malware creators know their files will be deleted if found, so they sometimes give the files names that are similar to known important files.

To be sure that you are not removing important files, use Computer Associates's free scan of your computer.

If sac.exe was on your computer, you'll probably see more spyware if you do a good search. Scanning your computer for free is the best way to avoid major problems in the future.