Hello , my pc specs :
Intel core 2 duo 2.33Mhz , 7gb ram ( had 4gb until last week ) , ATI radeon HD 2600 pro .
Had the windows 7 32-bit and my pc was working fine made the format and install windows 7 64-bit to be able to upgrade my memory ( 32bit was using only 3.3Mhz) .
After the 64bit installation the pc start lagging , the cpu usage is going over 80% and stays there , sometimes it is 100% and i can not move my mouse. This might happen while i am on facebook and listening radio over the internet and have some files opened or watching a movie and download something. Also the sidebar.exe uses from time to time 20-50% of CPU.