I believe there is a Microsoft download that will do exactly what Deepfreeze does:
"Deep Freeze instantly protects and preserves original computer configurations, eliminating routine IT maintenance while allowing complete unrestricted access to a workstation. Regardless of the changes made to a workstation, simply restart to reset the computer to its original state. The result is a protected, parallel network, free of viruses and unwanted programs. Deep Freeze is available for both Mac and Windows platforms."
Microsoft's program is basically used for public computers such as those in libraries.
If the user has a legit XP op system he may be able to download this.
Shared Computer Toolkit for Windows XP product overviewhttp://www.microsoft.com/windowsxp/shareda...s/overview.mspx
The Shared Computer Toolkit is ideal for computers in schools, public libraries, community technology centers, and Internet cafés. It allows those who manage shared computers in these environments to easily:
Defend shared computers from unauthorized changes to their hard disks.
Restrict users from accessing system settings and data.
Enhance the user experience on shared computers.
Defend shared computers from unauthorized changes to the hard disk
Defend Unauthorized changes to a hard disk can make shared computers less reliable. Windows Disk Protection helps to prevent users, viruses, spyware, or other programs from making permanent changes to the hard disk by clearing changes each time the computer restarts.
Because certain changes, such as critical updates and antivirus signatures, need to be permanently saved, Windows Disk Protection allows you to schedule such changes to occur automatically at whatever time you choose.
The Windows Disk Protection tool:
Helps protect operating system files
• Clears changes when the computer restarts
Automates critical and antivirus updates
Lets you choose to save changes to disk
Restrict untrusted users from system settings
Shared computer users can't always be trusted—they are often anonymous, and sometimes mischievous. The User Restrictions tool makes it easy to create restricted local user profiles so users have limited access to Windows system utilities, files, and data. You can prevent user access to Control Panel, the command prompt, any drive on the computer, the Registry Editor, and many other system utilities. You can also prevent users from running unauthorized software on a shared computer.
The User Restrictions tool is best suited for workgroup environments in which users share accounts and passwords, and where Active Directory is not present.
The User Restrictions tool lets you:
Restrict access to Windows system utilities
Prohibit access to important data
Prevent users from running unauthorized software
Simplify the Start menu
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Enhance the user experience
Users generally prefer a consistent, familiar, and private shared computer experience. The toolkit helps shared computer operators create an interface that will not confuse or distract users with unnecessary programs or options.
The toolkit also helps to protect user privacy by refreshing the desktop, user settings, and user data each time a new user logs on. Plus, it consolidates several accessibility features into one user interface, so users can more easily access the features they regularly use. For users who are new to computers, the toolkit also provides a variety of suitable online learning resources.
Affordable: No charge for licensed customers of Windows XP
From Faronics - manufacturer of Deepfreeze:http://www.faronics.com/html/product.asp
Deep Freeze instantly protects and preserves original computer configurations, eliminating routine IT maintenance while allowing complete unrestricted access to a workstation. Regardless of the changes made to a workstation, simply restart to reset the computer to its original state. The result is a protected, parallel network, free of viruses and unwanted programs. Deep Freeze is available for both Mac and Windows platforms.