Windows features a Console Registry Tool, accessible via the command prompt, which allows specific keys and sub-keys to be exported.
To try this, go to Start > Run and enter cmd, then click OK.
From here you can get help (type reg /? and tap Enter) or get on with the job of exporting keys.
For instance, to export a key for X,to the root of C: type:
reg export KEYNAME c:\
So – three ways to easily and confidently backup the Windows XP registry!