Resolved Bootmgr is missing

Built new computer, powered up and all seemed to be OK set bios to default level, it then advised me to load OP system, put in Windows 7 ultimate disc and was halfway through loading software when computer switched off.
If I now power up I get the following ASUS Motherboard screen P7P55D-E LX
IO level up current state disabled Next state usb3 If you want to change IO level state please press IO_levelup button (do I need this at this stage?)
Press del to run setup
Press tab to display bios post message.
What ever I do it comes back to the message Bootmgr is missing
Press Ctrl+Alt+Del to restart.
I seem to be in a loop would appreciate any suggestions. Mike Devon

 

Try repairing it with the Windows 7 install disc. I've had this error on Vista and the Vista disc fixed it for me several times.

 

Lukeno1, Thanks for that I'm up and running. Mike

 

Not a problem, I've ruined my bootmgr several times so