Windows wont boot unless bios is reset

[Bill Vanhovitch]

Ok, so long story short my computer got un-plugged when it shouldn't have.
its an HP Machine running windows 8.1 now when i turn it on it says secure boot violation, once i get passed that it says that there is no operating system installed on my hard drive.
i know enough about computers to have the idea that this is some sort of corruption in the MBR. i am unable to access the recovery tool to use bootrec.exe, i can hovever go to bios settings and chose "restore to defaults" then the machine boots up normally.
but i have to do this every time I boot. I bought this computer used from micro center so i did not come with any discs or anything of that nature. any help will be greatly appreciated

 

[Tradesman1]

After the Restore to Defaults, it boots normally to Win? If Win 7 boot to safe mode with command prompt and run Bootrec. Might also look here:

http://www.tomshardware.com/news/win7-windows-7-mbr,10036.html

 

[Bill Vanhovitch]

I ran bootrec /rebuildbcd, and got a notification saying that there were 0 operating systems on my computer i tried running a fix i found attrib c:/boot/bcd -h -r -s but that still didn't work. lastly i tried using disk part to select my os partition and try and mark it active but it would not let me. i really hope that i can figure this out and i appreciate you reply

 

[Tradesman1]

See if you can borrow an OS disk for the OS you are running and do a system repair