Thanks for your help, dalchina ! I'm gonna restore.

If I use the restore point, all the files I installed since (Including the ones in the new user) will be gone too right ?

It showed no result. After 100% completion it just restarted. I have one system restore point. How to check SMART parameters ? Also I recently used VirtualBox and created a virtual hard drive. Is it...

No. It didn't work. Actually, the C drive repair I mentioned previously was chkdsk command that ran automatically by the computer. So, I basically did manually. But, the problem persists.

I built a custom PC with Windows 10 64 Bit installed in it 10 days ago. Everything was running fine. Today I started my computer and showed a notification which requested me to repair C:/ Drive which...