Hello,
I have had a conflict between Tweaking.com Registry Backup and another startup program for some time and I finally took it upon myself to figure out which one it was.
The problem manifested itself by causing Registry Backup to crash, not every time, but once in a while.
The program that Registry Backup conflicted with is a mouse software program called razerhid.exe.
I fixed the problem by using Winpatrol to delay the startup of razerhid.exe by twenty seconds, since then, no more problem.
Just thought you would like to know.
I use XP SP3, 32 bit.
[added]
This also improved boot up time.