how do know what rpm your hard drive is
unless you have a laptop, it will be 7,200 rpm. If it's a laptop, you will almost certainly have 5,400.
If you have a SATA hard drive (which you will have if you bought the PC in the last couple of years) just select the amount of drives that you have. You can check this in My Computer.
what kind of processor i have?
Right click on My Computer and click Properties. On the left hand side it will tell you what CPU (Processor) you have and how much RAM.
what is compacitor aging
set this to 15%
what if the video card i built in the mother board?
If you don't have a built in nVidia chipset, select the first option "32mb or less AGP/PCI Video"