remember,, when your Laptop is connected to Power, Set it to High Performance Mood
and while Power is off, Set it to Power Savings mood
these mood should be changed automatically.
Youre Windows Update must set you to a Default settings.. thats why it happened. have a nice computing ...
My Computer
Computer Manufacturer/Model Number
Self Built AMD Clone PC....
OS
Windows 7 Ultimate x64
CPU
AMD PHENOM II X4
Motherboard
MSI p33 740M
Memory
4GB DDR3 1333
Graphics Card(s)
Sapphire Radeon 4770HD
Sound Card
ViaTech HD Built in: with MICROLAB M-111 2.1 Speakers