Using cheat codes??
If you are disable *all* of them and try going back to the same section again one more try.
If it's still crashing, I hate to say this, you have a hardware problem-- please check the following:
1. Check the event log.
2. If it mentions "Device\Video0 has got stuck in a infinite loop",
you are a victim of the notorious infinite loop
Windows XP crash-- Please check out the infinite loop section
at viaarena.com
3. If the error code is 0x000000A, make sure you are not overclocking your processor chip-- or increase the Vcore voltage.
4. If the error code is 0x0000050, it's probably a bug caused
by cheat codes (causing conflicts) in Project64.