hive(file) systemroot Startup Blue Screen!!

So my boyfriend shut my laptop off by just unpluging it and now everytime we try to start it it says there was an error and to choose to start up safe, safe with network, safe ms dos, last known working cong fig, or normal.
I have tried all and none work!


When I go to normal start up and leave it for a while it will go to a blue screen saying something like,
all physical memory dumped,
hive(file):\systemroot\system\
error missing, corrupted, or unwriteable...

Any ideas?
I cant afford to dump my hard drive and reformat it I just loaded alot of important stuff on there.....