CPU佔用率高和上網速度慢的問題

我部電腦有兩個問題:
1.冇左一個叫dllcache既資料夾

已經搵埋隱藏既資料夾都冇,

呢個資料夾既野係咪好重要??

冇左咁點算好?

2.CPU佔用率好高,唔知邊度有問題?

希望各位高手解答

以下係我部電腦既處理程序:

taskmgr.exe Adminstrator
iexplore.exeAdminstrator
wmiprvse.exe SYSTEM
unsecapp.exe Adminstrator
alg.exe LOCAL SERVICE
LMS.exeSYSTEM
ekrn.exe SYSTEM
BCUServices.exe SYSTEM
explorer.exe Adminstrator
ATKKBService.exe SYSTEM
iexplore.exe Adminstrator
spoolsv.exe SYSTEM
PPSAP.exe Adminstrator
ctfmon.exe Adminstrator
egui.exe Adminstrator
BCU.exe Adminstrator
svchost.exe LOCAL SERVICE
rundll32.exeAdminstrator
svchost.exeNETWORK SERVICE
iexplore.exe Adminstrator
svchost.exeNETWORK SERVICE
svchost.exe SYSTEM
nvsvc32.exeSYSTEM
RTHDCPL.EXE Adminstrator
lsass.exe SYSTEM
services.exe SYSTEM
winlogon.exe SYSTEM
csrss.exe SYSTEM
smss.exe SYSTEM
WgaTray.exe Adminstrator
PDSched.exe SYSTEM
svchost.exe SYSTEM
UNS.exe SYSTEM
System SYSTEM
System Idle Process SYSTEM