Windows 10: Reverting back to factory operating system

I bought a laptop and tower from a guy that apparently took the factory windows 7 system and changed it by putting windows 10 on it somehow. Is it possible to convert it back to the factory windows 7 system? It runs so slow and crashes repeadly!!! Aggrivated!!!

:)

 

Programs not working

In post 26 there were steps listed to fix the operating system corruption.
Are you able to follow them?
In post 29 was the suggested dism repair command.

 

Factory Reset Windows 10

Hi Johnathan,



Thank you for posting your query in Microsoft Community.

I apologize for the inconvenience caused. We are glad to help you.



Please share this:

• 
  Which Operating System was pre-installed on your computer?
  

I would like to inform that you can factory reset Windows 10, but, if you factory reset the current Operating System will get reverted to the previous Operating System which was installed when you bought your computer as new.

This is the reason why your computer has reverted and is forcing you to upgrade to Windows 8.1.



Hope this information helps. Do get back to us for further queries. We will be happy to assist you.



Regards,

Jenith

 

,,An operating system wasn't found." after factory reset

Hi,

Thank you for posting your query in Microsoft Community.

I understand the inconvenience caused. I will be glad to assist you with this.

I would suggest you to try the troubleshooting steps suggested in the help article below and check if it helps.

“An operating system wasn’t found” error when booting Windows


Do let us know the result.