Hey guys. I've got an HP Pavilion laptop that seems to have a messed up hard drive. Automatic repair failed, and I can't run sfc /scannow because of missing files. I was able to run chkdsk, and it came up with a lot of errors, missing files, etc. I'm assuming bad HD. I plan to replace the hard drive, but not sure how to get Windows 10 back on the new drive. There is no product key on the laptop, and, obviously, I can't get into Windows to find the key. Is there a simple way to do that that I'm missing? Thanks in advance!