Thank you so much..problem is my brother installed it for me when I bought the laptop..i dont have a disk. I rewrote what all is going on to give better detail.So here is a copy and paste.Maybe you pros can help me..

Also I think my bro said it was a 84bit? whatever that means I dont know..Sorry I am trying very hard to learn on my own.
Hello, I am new so please speak like you would to a cave woman. I have vista ultimate on my laptop.Its a hp pavillion dv600. I was running tune up utilities and pressed ok to compress c. drive... I stopped it as soon as I saw I had hit the button and cancelled it. Then when it restarted it says BOOTMGR is compressed Press Ctrl+Alt+Del to restart..I do and it doesn't restart. It says Intel (r) Boot Agent FE V4.1.18 Copyright 1997-2005 Intel corporation
and then the ctrl+alt+del to restart..I went into the Phenoix bios and tried restoring defaults by hitting F10 like it says at the screen on the bottom left when the HP screen comes up for a min.I changed it to stay up for 5 sec cause it was just flashing. It also gives a option to push esc to change boot and F12 to boot from Lan. My desktop is a old compaq presario and i believe my brother just installed Windows Crystal? If there was a way to boot it from the Lan how would I do it..also on this crystal it has A program called ISO that appears to be some kind of program where you can make CD/DVD I am guessing..Could I somehow get the boot file from my Desktop and put it on my Laptop?? If that was a dumb question sorry but I figure you have to ask to learn..Thanks