Lowly end user here. Old Dell Pentium 4 (2.26 Ghz, 2 G RAM) running WinXP Pro v.2002 service pack 3, with SEP v. 11.0.6200.754 , most recent viral/spyware def update r. 52 1/27/11, most recent proactive threat def update r. 8 1/28/11, most recent network threat def update r. 1 1/27/11.
Same problem (?) as described for earlier versions of SAP enterprise client version. rtvscan.exe has a regular spike of activity up to 100% CPU use, preventing other programs from functioning for significant percentage of time. The spikes occur every 13 seconds, spike duration 5 seconds, spike is not a flat wave, duration of 100% CPU usage is less than 1 second, but the CPU usage is above 80% for 3 seconds. Also showing a minor blip at the same time is ccSvcHst.exe.
I am worried that the computer could overheat - heat sink fan is on 100% of time. IT can be maddeningly slow at times - I am searching for fixes in the meantime.