Put your windows disk in the computer and boot to it. Once you do, continue through the prompts. Go to the "Recovery Console" and then upon reaching the c:\ prompt, type CHKDSK. Let that run and reboot (Not to the cd, just normally), see if it works. If not, I would do a repair on the windows files. To do this, boot to the cd, and wait till it checks your hard drive. It will then say "Press R for repair". (NOT RECOVERY CONSOLE, a little past that prompt). This will erase the files in your c:\windows folder and replace them. This will then go through the windows setup, but once it finishes your files will still be there the way you left them.
Astronomers gather additional evidence suggesting Planet Nine is real
