I wonder what “limited lifetime warranty” means.

It probably means you can complain any time about a manufacturing defect, but not anything else.

Anyway, the terms should be printed somewhere on the box or in a paper inside.

It is on the sense that Windows admins are the ones that like to buy this kind of shit and use it. It’s not on the sense that Windows was broken somehow.

Well, “don’t have self-upgrading shit on your production environment” also applies.

As in “if you brought something like this, there’s a problem with you”.

You may want to replace the disk on that computer after you fix your boot. (As people said, with a recovery drive, probably the same one you use to install.)

After your computer is back, get a SMART client (like smartmontools) and check your disk status.