Windows Server: How to Repair the Boot Files in Windows Server 2008 or 2008 R2 if the Server Won't Boot
There are a number of possible causes for the failure of a server to boot into Windows. This article deals with a problem in the boot files and demonstrates how to repair them.
When booting to the Windows Recovery Environment (WinRE), the drive letters are assigned on a first-come, first-serve basis. For example, the C: drive in Windows will often have a different letter in WinRE. The DiskPart utility can be used to keep track of the drives and what is stored on them.