Check these links.How to troubleshoot the System Restore tool in Windows XP
System Restore wasn't really intended to be able to restore you back to any arbitrary time in history. It has limits. Limits you can control, somewhat, but even then there are limits
Have you tried safe mode?
using a Dell 3000 series , xp home--intel pentikum 4 processor @ 2.8 GHz with 1MB cache
How do i fix my system restore it wont go past this mth..