I had the same problem with Bootskin on my XP Dell PC: Downloaded it, made a restore point, rebooted and installed Bootskin. When I rebooted again, XP crashed & kept crashing at about where a pre-selected test skin was supposed to appear during startup.
I couldn't get back into my PC until I uninstalled Bootskin in safe mode.
Seems enough ppl use Bootskin without problems so I'm not calling it a buggy app & I doubt it's a Dell issue.
Oh, well..just one of those things.