I use win_xp_sp3 inside my virtualbox i was mapped all the xp folder destination into my host machine in regedit. and now i need to change the my username and i don't remember all files i changed. is there any possibility on regedit find and replace?
There are a few paid products out there (with with free trial periods), for example:
For a 'free' option you can try:
Just remember to backup your registry before you do anything! :)
Something like ERUNT should help for the backup.
The free version can be used 50 times, it can do regular expressions.