You definitely need a Windows disk - make one as below or borrow a friends (needs to
be same 32 or 64 bit) to try to fix - you can make a copy and use your own Product ID
as they are not copy protected. The Product ID determines which version installed for
If you do not have a Windows 7 disk you can borrow a friends as they are not copy
protected. Your System maker will also sell the physical DVD cheap since you already
own Windows. Also you can make a repair disk on another computer.
If you need to make repair disks - these help repair Windows not re-install.