You can close down even more services than Game Booster recommends by default freeing up even more resources.
In Game Booster click options in the top right corner then click edit service list a notepad document will open. Copy and paste the lines below at the end of the section marked with your OS.
BFE=1
CryptSvc=1
LightScribeService=1
fbdusb_svc=1
MsMpSvc=1
PlugPlay=1
Spooler=1
SeaPort=1
wscsvc=1
ShellHWDetection=1
Schedule=1
TeamViewer5=1
Themes=1
ProfSvc=1
eventlog=1
wlidsvc=1
netprofm=1
gpsvc=1
NlaSvc=1
Netman=1
nsi=1
RpcSs=1
SENS=1
Winmgmt=1
UxSms=1
These are for Windows 7 but should work OK with other OS, lines that do not apply will be ignored by Game Booster.
Game Booster makes no permanent changes to your system. If you experience problems just reboot and your PC will be back to normal.
Please post up if you find this good or bad for your gaming!