Here's the exact error message. It has a buncha code, so I'm sure it'll be useful. Oh and thanks, I didn't know about the DOS thing. Now if only I could remember how to get my computer to boot to DOS...

Litestep
This program has preformed an illegal operation and will be shut down. If this problem persists, contact the program vendor.

details follow
LITESTEP caused an invalid page fault in module at 0000:00000091.
Registers:
EAX=81735fbd CS=0167 EIP=00000091 EFLGS=00010297
EBX=0066808a SS=016f ESP=00667ed4 EBP=0000022d
ECX=00000018 DS=016f ESI=00668008 FS=2fe7
EDX=7be4b82a ES=016f EDI=00000000 GS=0000
Bytes at CS:EIP:
00 93 0e bc 0f c9 00 c6 0f c9 00 d0 0f c9 00 6c
Stack dump:
0000022c 00000084 00000000 012c0190 00667f40
bfbb3ff9 0000022c 00000084 00000000 012c0190
00000000 01537070 00000000 00449524 0066808a
4f3017c7