help needed with load needed for DDLs kernel

i had shortly made a disk clean up as my drive c was full...and then when i reebooted my computer afta da check it reported a problem like "load needed for DLLs kernel".......i am totally frustrated with this thing.....i would appreciate any help and by the way if there is a way in which i can solve dis without windows xp cd i would be very grateful.....otherwise tell me the way which i can solve this with the xp CD !!
Thank you...