What was the solution to this? Was it a bug in the uninstaller? I don’t know if it’s the same issue, but I’ve found that the NASM uninstaller sometimes tries to delete all of the files in my root C directory, including the boot manager! Fortunately it doesn’t succeed in deleting the boot manager, but it did delete the boot sector backup (not really an issue, but worrying nonetheless).
Attached is a screenshot where I have tested this on a Windows Vista x86 machine. The “mart.txt” file is just an empty text file I put there, to check whether it is deleting all files indiscriminately.