Good / helpful discussion! Thx 
Just a couple side comments
1. Saving a copy of your Windows service settings for future reference
I agree. Having a copy is invaluable when one wants to look back
Just as fyi...Checkout freeware tool
Serviwin
I find Serviwin
verrry useful to both save (as well as manage) Windows service settings. IMO Serviwin has a much nicer/user friendly interface then the native Services MMC snap-in from Windows. Serviwin can also create and save text file output suitable to import into a spreadsheet.
> This makes it quite easy to look back and sort your old data as needed (e.g. by column header)
> Ability to import services into Excel also allows the option of setting Excel to compare and automatically highlight changes between settings in two different snapshots
2. Creating Incremental Disk Image Backups
People mucking with their registry and/or services should be also be creating disk image backups to cover-their-@@@ if disaster strikes in any case!
(Also advise they invest in a product that can create incremental disk image backups. IMO: Running incremental backups makes the disk image backup process much simpler.