I am facing the same problem. But I don't have the windows 7 installation disk as the OS came pre-installed with my laptop(Sony Vaio). There is a recovery drive which has the OS but it cannot be accessed as there is the 'grub error' when I restarts my computer. I want to remove grub and vector linux from my laptop. Please help me out.
There are several on line resources you can use to obtain the media you might need.
If you just need a Windows 7 Repair disk, which should be sufficient for your current issue, you can obtain one from our downloads area here Official Windows 7 Downloads - Downloads - Windows 7 Forums make sure you grab the correct ISO for your architecture (32 or 64 bit).
If you need the full install media perhaps this resource would help Download Windows 7 Integrated With SP1 ISO – Official Direct Download Links
Burn the ISOs to the appropriate media CD for Repair Disk, DVD for full install media, using the slowest speed your burning software supports, or get ImgBurn and set it to 4x