http://service1.symantec.com/SUPPORT/ent-s...niver=sav_ce_10 DoScan.exe causes high CPU usage Situation: You installed Symantec AntiVirus Corporate Edition 10.0. After you restart the computer, you notice that the process DoScan.exe is using a large amount of CPU and memory. After the DoScan.exe process completes, the Rtvscan.exe process is using about 40 MB of memory. Solution: Symantec is investigating this problem to determine a solution. This document will be updated when new information or a solution is available. The DoScan.exe process is part of the default startup Quick Scan that runs after a user logs on. You cannot disable this Quick Scan using Symantec System Center.