Wants Windows7 back after Relacing Windows Shell Using Instant Sheller

[Monic123]

I came to this forum for help after searching internet with not help.
My aim was to lunch Kodi on booting my pc, so I found this program which I installed, it works fine, but I wish to temporarily disable the shell or perhaps boot to window to perform other task then reactive the shell. I have tried everything suggested on the Game site but fail to regenerate Wins7; this is very frustrating as need important info inside my pc.
Please help I am running MAD, wife and kids needs their documents

Here is the link to installer shell
Instant sheller and shelling guide | GameEx

 

[Monic123]

Guys pls dont leave me hanging, this forum is my last hope, let me know if additional info is needed to assist with solution.
I have been playing around, so when press Crt&Arl&Del I can see task manager, but from here nothing seems obvious except for the usual task manager screen and very difficult to navigate coz the mouse seems not to be working, except for shift key,
also I could get into bios, just stearing at the screen affraid of even change any setting with fare it might mess things further.
Although the only screen I can see is Kodi when I turn on the pc each .

Pls help!!!!!!!!!

Cheers