Good day!

I have my problem on my PC..
It's windows 10 and I clean and scan it to remove any virus. After that it requires to restart my PC, so I did.

But when it comes to log in menu, I didn't see my account, OTHER USER which is I don't know the user and pass. And it keeps restarting after a minute.
Plus I cant boot to bios either in safe mode.

Please help. I don't have a bootable device.