I got it fixed using boot-repair burned to a thumbdrive.
Part of the problem is that Linux will spit out something like “Authentication needed...” and doesn’t tell you WHICH password it wants, user or root? Once I got that straightened out, I tried and tried and tried to burn an ISO image to DVD - no luck at all.
Anyways it’s now OK, Linux Mint on my main drive, a 240GB SSD unit and Windows XP on a second drive.
I still think XP is the best OS I’ve ever used on the PC.
Thanks for your help!
Glad you got it worked out.
Rufus.exe for windows is a good USB ISO burner. I haven’t used an optical drive in years.