How to compare different registries
 
02/03/2006 - 18:32 (Category: Windows)

Every time you make changes to the Windows's registry, you make a backup copy of it too (you should!). Anyway sometimes you can't remember what you changed. If so, follow these simple steps to compare different registries:

1) click on Start -> Run
2) type regedit
3) click on File -> Export
4) name it 'before' and save it on C:\
5) make changes to the registry
6) press F5 to update it
7) repeat steps 3) and 4) but name it 'after', this time
8) go to Start -> All Programs -> Accessories -> Command Prompt
9) at the Command Prompt window, type 'cd \' (without quotes)
10) then type 'FC before.reg after.reg > diff.txt'
11) now you can edit the diff.txt file with your favorite text editor

The FC command compares 'before.reg' and 'after.reg' registry files then writes differences into the 'diff.txt' file (you can name it as you like, e.g. 'differences.txt)

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