Big error: Disc boot error

My pc, has a problem

It all began when i got the error

missing windows root system32 hal.dll

I tried to restart didnt work, so then i tried reformating, but got an error

DISC BOOT FAILURE PLEASE INSERT SYSTEM DISC AND PRESS ENTER

Ok, i tried everything, changing hardrive ports, BIOS setting boot order etc, been all over the net no answer,

Sometimes i can get into formating but then it gives me an error alon the lines of me missing " everything in my hardrive" i dont know what to do anyhelp i cant even format please
 
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