How to solve a problem with a computer?

Question

Computers

Hello.
Today I tried to convert the disk to mbr, but it did not work. I read somewhere that you need to convert to base. I converted the disk (not a partition, the entire disk) into a basic one using the "mini tools partition wizard" program, applied the changes - the computer rebooted, some actions were performed.
The computer turned on again, and now every time the "Boot Menu" sign appears where you are asked to choose:
SATA HDD: ..., SATA CD: ..., Windows Boot Manager, Windows Boot Manager.
Whatever I choose - a black screen and this plate is displayed again. What to do? I don't care about the disk, I have very important data there, can I extract / restore it somehow? Does this mean that all data, including the system, is deleted? Or is it possible to somehow convert the disk back?

Answer 1

Most likely covered with a screw loader. Extracting data from the disk - there is nothing easier, boot from any liveCD or connect the hard drive to a working computer.