THi if it happens that you encountered one of the error your computer shows which is Error: 1962, I found one of the solution to get rid of this pain in the ass error. Just to give you a background why I came up to this error, this happened when I updated my desktop lenovo.
After some minutes of waiting and being confident that everything will be fine, after reboot, it suddenly flashed the screen with error 1962. What I did in the first place is to reformat my PC but with no avail. I couldn't reformat co'z what I only have that time is my bootable flash drive with OS and even I changed the sequence of boot, my can't read my flash drive.