suppose I have a single 500G drive in my desktop PC running Windows 7. The drive contains everything - the system files, the applications, all of the data, etc.
Suppose Windows irrecoverably crashes for any reason.
How would I then restore my PC back to life? If I had a separate system partition, I'd just reformat it and do a clean install of Windows. But I don't.
What are the pitfalls of reinstalling Windows 7 on a drive that's not freshly formatted? Is it even possible?