vista系统进程项60多个 哪些没用 哪些是病毒？达人进，高分求解，我该怎么处理？有什么工具能解决

System Idle Process
System
smss.exe
csrss.exe
wininit.exe
csrss.exe
services.exe
lsass.exe
lsm.exe
winlogon.exe
svchost.exe
svchost.exe
svchost.exe
Ati2evxx.exe
svchost.exe
svchost.exe
svchost.exe
audiodg.exe
SLsvc.exe
svchost.exe
Ati2evxx.exe
svchost.exe
spoolsv.exe
taskeng.exe
svchost.exe
dwm.exe
explorer.exe
GoogleUpdate.exe
taskeng.exe
MSASCui.exe
hotkey.exe
UiServer.exe
LitModeSwitch.exe
egui.exe
GoogleUpdater.exe
ekrn.exe
liveupdate.exe
LitModeCtrl.exe
MDM.EXE
svchost.exe
svchost.exe
sysagent.exe
svchost.exe
SearchIndexer.exe
WUDFHost.exe
mobsync.exe
360Tray.exe
ieuser.exe
conime.exe
iexplore.exe
taskmgr.exe
WmiPrvSE.exe
wuauclt.exe
QQ.exe
TXPlatform.exe
iexplore.exe
FlashUtil9b.exe
WmiPrvSE.exe