Look for a file called:
wininit.ini
Should be in "c:\\windows"
If it is there, rename it.
If that takes care of it, then find out what was in there. IF it appears to be important, keep it handy.
If the machine works as required, then MAYBE it was a "cleanup" effort from a program that never finished installing. As we all know Windows like to not allow you to delete things while loaded into memory.(*NIX doesn't have that issue if you be root...)
Good luck...