Well, I have found the particular SVCHOST that is taking the 99% cpu time:
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SVCHOST.EXE 640 AudioSrv, BITS, Browser, CryptSvc, Dhcp,
dmserver, ERSvc, EventSystem,
FastUserSwitchingCompatibility, helpsvc,
lanmanserver, lanmanworkstation, Messenger,
Netman, Nla, RasAuto, RasMan, Schedule,
seclogon, SENS, SharedAccess,
ShellHWDetection, srservice, TapiSrv,
TermService, Themes, TrkWks, uploadmgr,
W32Time, winmgmt, WmdmPmSp, wuauserv,
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But there are numerous service there, how do I know which one that is causing the problem?.