hostile said:
but that will bring back everything I strove to get rid of eg bad programs
etc, surely there is another way eg "system state"
You say that you are a novice - yet you find Regedit, something
a novice would have no idea about. Regedit is not on any start
menu so you must have managed to find it and run it.
Then on a standard install you would have got the User Account Control
dimming the Desktop and asking you if you wanted to run Regedit.exe and
possibly make system changes.
You must have agreed and clicked OK.
Then for some unknown reason you delete some registry keys without
backing them up and now you complain that Vista should have stopped
you doing something stupid.
It isn't Vista that's stupid, it's you.
I don't know what you mean by "system state".
Type "system state" into Help and Support search and read about system restore.
End of thread for me, good luck.