Windows 7: Unknown Device

I can clarify relationships between ControlSet00X and CurrentControlSet

System read & use informations from only HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet as name of key suggest,so if you want anything change in
system it's enough modify only this key.


In system there are usually 2-3 ControlSet00X (ControlSet001,ControlSet002,ControlSet003..) but somebody may have more of them. I know one guy which have almost 100 such kind of keys
These keys are created i.e when you use "Last Good Configuration" option

Only one of ControlSet00X is loaded under CurrentControlSet hive

To identify which one is loaded as CurrentControlSet you have to navigate to key

HKLM\System\Select and find Current string

if Current is equal 1

that means under CurrentControlSet is loaded key ControlSet001

if Current is equal 2

that means under CurrentControlSet is loaded key ControlSet002

and so on

of course when you edit anything in CurrentControlSet you edit his clone as well.Remains ControlSet00X keys are only kind of registry backups

BTW
There is a good tool which can identify registry keys,files for drivers
Device Remover - The Powerful Device Manager