svchost.exe 1156 DcomLaunch, TermService
svchost.exe 1236 RpcSs
svchost.exe 1324 AudioSrv, Browser, CryptSvc, Dhcp, dmserver,
EventSystem, FastUserSwitchingCompatibility,
lanmanserver, lanmanworkstation, Netman,
Nla, RasMan, SENS, SharedAccess,
ShellHWDetection, TapiSrv, Themes, W32Time,
winmgmt
svchost.exe 1364 Dnscache
svchost.exe 1404 LmHosts, WebClient
It lists like this. If you kill the PID 1236 (RpcSs) your Windows is definitely history. The others may not completely shut down your Windows, but they will render it inoperable. I strongly recommend AGAINST closing any of the svchost.exes. All you'll gain from doing that is a less functional Windows.