registry files

Put a program on my computer that won't uninstall. Still has references in the registry. I was going to remover references to the registry but was going to manually going to back the registry files.
I can't remember which files to back up. I thought they were user.dat system.dat and another one i think. I can't remember what directory they are in ? WIndows or c:\
The program was spykiller. I was trying it out. Since this is a work computer I can't mess this one up like I can at home.
Windows 98 second edition.
Any help would be appreciated.
Thanks

They are User.dat and System.dat.
They ARE under c:\windows.
Why are you worried?
What did you do?https://forums.windrivers.com/https://forums.windrivers.com/
Trying it out, huh??https://forums.windrivers.com/https://forums.windrivers.com/
Sooo, where have you been that you don't want anyone to see???
Anyway:
Go to regedit/HKey local machine/software
Find spykiller and delete the key.https://forums.windrivers.com/

That got it.
DIdn't need to back up the registry but I felt better doing it.It's a
work computer so i dont want to mess it up.
Been a while since I been into the registry and backed it up.
But it's ok now .
Thanks.

1. Delete its folder from C:\PROGRAM FILES(or whatever location it installed itself in).

2. Delete its key in the registry under:

HKEY_LOCAL_MACHINE - [Software]

HKEY_CURRENT_USER - [Software]

3. Delete its listing in Add/Remove Programs under:

HKEY_LOCAL_MACHINE - Software - Microsoft - Windows - CurrentVersion - [Uninstall].


Frank's Windows 95/98 Tips (Also a Windows XP user)