When SVS and Trend Micro OfficeScan are installed on the same computer, the CPU utilization goes to a 100 percent.
Trend Micro looked into their code and found that the high cpu utilization was being cause by their scan engine.
Please read the following article from Trend Micro work around process:http://esupport.trendmicro.com/pages/High-CPU-usage-occurs-on-a-Windows-computer-with-Altiris-Software-Virtualization-Agent-after-installing-WFBS-or-OfficeScan.aspx
If you have questions about the work around please contat Trend Micro.
Software Virtualization Solution 2.1.2088.0
Trend Micro* OfficeScan version 8.0
So far, the issue has only been seen on Windows* Vista computers