IRQL-NOT-LESS-OR-EQUAL

Question

i have 2 hard disks primary master and secondary master both had windows xp pro insttalled and working fine till sudden electricity failure.now i am only able to log into my second win xp installation on drive "H" and cannot boot from "c' the earlier one.i can see on the initial start up screen both option but when i click to boot from "c"the windows slide bar stops just at the starting and nothing happens afterward.i need my "c" drive's windows back.i have tried to repair but it did not work and tried safe mode but it will only copy 5 files and stop.it shows something like this;mult(0)disk(0)rdisk(0)partition(1)winsys32
toskrnl.exe.............................................................hall.dll.............................................................KDCOM.DLL............................................................BOOTVID.dll...........................................................configsystemsomeone please help.