Gaming Reinstalling Vista.

[Arm the Homeless]

Defragment you could use Smart Defrag.
Registry you could use CCleaner.
Anti-Virus/Adware you could use AVG Free.
Instead of reducing Aero, disable it.
Agreed. Kill sidebar. Way too heavy for something that should be light.

 

[dice]

Closed at request of OP.

And stop with the trolling.