But how to backup registry files from %windir%\system32\config ?
I cannot get access to them.
Exist it some other way to backup/restore registry?
Should I use
"reg export HKEY_LOCAL_MACHINE\SOFTWARE test.reg"
or it is not good idea?
Can it be problem with import of registry?
And what registry keys is most important to do backup of?

To backup wpa* is easy in console mode.
.....I think now that using of windows buildin fictions like copy,xcopy can be enough becouse thay can verify files that was copied too. Or I losing perfomance or it more practical to use other software for it?