You never backup? Bad boy.
I have messed with the registry before, but I made darn sure that the guide was legit.
During the last 1/4 Century I have make "proper" Backups less than a half dozen times (and never made "improper" (partial or non-verified) Backups) except on a file by file basis (EG: backup Registry or Source Code before fiddling with it).
My Backups were mostly done as an experiment to see if (
for me) I could see a purpose in doing them.
It takes days and dozens of DVDs to backup your puny 250GB Drive when it's half full, admittedly the subsequent incremental Backups go very quickly.
During the past 1/4 Century I am quite certain that I have lost WAY less than a gigabyte of Files and have saved
many days (and DVDs) for better use. This is why
I do not backup, that does
not mean that others should follow my example.
It is like driving on a private Road (or at four in the morning) without Seatbelts except (to me) it makes more sense to spend a couple of seconds to put on Seatbelts than it does to tie up my Computer (and have a big stack of useless DVDs) for an
accident that I will not cause. It is a weighing of what you know, what you mess with and what you can afford.
PS: Messing with the Registry can toast you when you reboot and a Backup (of just the Registry) will do nothing to help.
A rollback Filesystem like
ZFS provides and running under a Virtual Machine can avoid
everything except loosing your last few minutes of work and another minute to fix everything.