(WinXP) Increase hard drive space for System Restore

[jadison]

If you have a huge hard drive and would like to increase the amount of drive space used beyond the "12% maximum" for System Restore, do the following:

• Goto HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\SystemRestore
  
• Look for the DWORD Value 'DiskPercent'
  
• The Default value is 'C'
  
• You can change the default value up to 'F' which is 15% of your drive or any combination of letters A-F that could allow you to use up to 100% of your drive (if you so stupidly chose.)
  
• After you make changes, go check out your System Restore settings and you will notice that you can actually increase the maximum disk space you can use.
  

[Google]