Find Basic Info About Your Computer:

Right Click MyComputer >properties

Tells:
Your version of Windows running
Type of processor and sometimes the speed. (Pentium(r) = Pentium I)
(80486 = 486 computer).  Useless for Internet. Requires Win95
How much RAM is on board.

DoubleClick MyComputer >Right Click C: >properties

Tells:
The total capacity of your HD
How much is used (blue)
How much is free (pink)

To find more detailed info use Everest Hardware Diagnostic