Before Removing Linux:
- Make sure that you have a Bootable Disc of Windows 7 OS. You shall also use your Pendrive to make Windows 7 Bootable by using a software called Win2Flash.
- The other alternative is to use the option "Create a System Repair Disc" from Windows 7. It creates the bootable disc with the exact content that is needed here. But the point to note here is, you cannot use a USB Flash Drive for this!