Clean multiple user accounts at once

A reader calling himself "Net Star" asked a savvy question about PCs with several user accounts:

What's the best way to clean a computer with multiple accounts? Should you install and run software on each account? If you install the software on one account, will it clean the entire computer including each account?

For example, some programs like CCleaner will install only on one account and not offer the option for all users (accounts). Does this mean the program will clean the entire computer including other accounts or do I have to install CCleaner on each account to clean up each user's account?

PC cleanup tools take various approaches to removing junk from every account — from standard to administrator — without damaging or deleting files a user may require, and "System-wide cleanup help for multiuser PCs" is the main topic of my column this week in the Windows Secrets newsletter.

I also include a specific type-and-run example of automating CCleaner (http://www.ccleaner.com/), a popular free junk-file remover, for fully-automated operation across all users accounts.

I also discuss three other topics:

• More on "Tracking down unknown devices"
  
  
• Locked out of his own encrypted music files!
  
  
• Which is better: Play movies from hard drive or DVD?

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