Have noticed mention of reformatting a HD and clean installation of a HD.
Is there a difference? Thanks for any helpful response.
Yes, there's a difference.
To "format" means to clear off everything that's on the drive or
partition.
To "reinstall" (you reinstall the operating system, not a HD) means to
reload the operating system onto the drive or partition.
First you partition and format the drive, then you install (or
reinstall) Windows on it.
In Windows XP, you normally do all of this (partition, format,
reinstall) in sequence as part of the same operation when you boot
from the Windows installation CD.
That's the difference between them, but in practice, what people
normally want to do when they are unhappy with their current
installation is both format and reinstall--to start over from scratch.
So the distinction blurs, and often when someone uses either term, he
really means both.