I control my configuration with add/remove programs, start up management, and EvidenceEliminator to remove junk. But I still have a large number of files that are dated and unmodified from 3+ years ago.

How to determine if these files are really unused, and how to stage their deletion (in case I need to undelete)?

Thanks for advice.

/gig

Give this a try:

CCleaner - Update (http://www.ccleaner.com/update/)

Thanks. I use that tool too - it works well. But it does not clean up files that have not been used in - say - over three years. But appreciate the response. Will keep searching

Only you can know whether you need data files or not.