Having trouble with windows, need help.

Whenever I try to load windows it hangs up, no matter how I try to load it, and says UNMOUNTABLE_BOOT_VOLUME.

The computer that is having these problems is a toshiba, but I don't have a toshiba recovery disk. I do have a dell disk, and I want to perform a repair, so can I do the repair using my dell disk?

If you can't do that, find out what kind of hard disk is installed (brand) and go the manufacturers site and make a boot disk with their recovery tools. Try to repair with that, if you don't you'll have to reformat.thebrantmeister

But I'm asking if it is safe to use the dell disk?