Okay, here's a very big question on the behalf of a businessperson I know.

His office computer runs Windows XP Professional with an Intel Pentium 4 processor (2.8GHz), and 0.99 GB RAM. His computer has been running very slow lately, and I wonder if upgrading the processor on the computer would make it run faster and stop freezing up on his email program.

If that is not what should be done, could adding more RAM make the computer run faster and not cause the email application to freeze up randomly?