Windows 7: XP to Win 7 problem

Co-worker has a laptop that has Vista installed. She purchased Win 7 and had her brother install it.Now the dreaded bootmgr is missing error is showing up.I tried to do a repair,but it doesn't find an O/S.I have a repair disc and still didn't work.I don't know what he has done,but it appears he has screwed something up.I also tried a upgrade and a custom install from the repair menu ,but still a no go. She said that if the hard drive had to be cleaned to do a full install, that would be ok,but I can't get it that far.Eventhough it was an upgrade and she has a genuine Win 7 key,would borrowing an win 7 disc do any good?Any suggestions?Thanks

How far will setup go?

Clean Install Windows 7

It tries to install,but after 6% an error pops up telling me that the files weren't found or are corrupted.I'm going to try your link and I'll post back.

disk 0 partition 1: System reserved 100.0mb 86.0mb system
disk 0 partition 2 298.0gb 297.2gb primary

I assume I need to format partition2,because it tells me that it may contain files,etc that will be erased?

clean install gets to 6% and i get the 0x80070017 error.It was purchased online and burned to dvd.Could the disc have some bad files?

Try a different disk... and check the upgrade advisor what make and model is the comp in question?

The MBR is most likely on this 100MB partition. Try to fix it there - e.g. with EasyBCD.

HP dv600,I'll check into easybcd.What exactly will it do?

It allows you to fix a defunct MBR.

Ok,Thanks.