Windows 10: I accidentally factory reset my school laptop how do I reset it to the dcps program on...

The passage is in the question

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How to Factory Reset an old school laptop

Okay so a bit of back story: I used to go to this one school where they wanted us to bring our own laptops from home so that they can put their system on it. I gave them my Dell Windows laptop and they reset it to be a school laptop. It has blocked websites, admin passwords that I don't know, random school apps, etc. I've graduated and I still have the laptop but they didn't remove their system from my laptop. I tried doing the normal factory reset where you hold down the shift key then restart and then troubleshoot then factory reset....etc. but that didn't remove the school system from my laptop. it's still there. How can I factory reset it all the way to make the school system get off of my laptop and make it my personal laptop?

I know you've gotta clear the drive and reinstall the O/S but I don't know how to do that without an admin password. I don't know the admin password.

 

Reset Acer Travelmate to factory settings

Hi all, I have an Acer Travelmate with Win10 (1607), I would like to save Win 10 to a stick, then reset the laptop back to factory settings and then reinstall Win10. There is no program on the laptop that requires saving. Any advice or suggestions, not to technical, would be very much appreciated, thanks Roy

 

Accidentally shutdown laptop during factory reset

The laptop was accidentally shutdown during a factory reset. Whenever I boot it up, it loads as normal but none of the application works. The start menu doesn't open and I can only access it when I right click. Anything involving administration privilege
doesn't work so I cannot continue the reset. "This file does not have a program associated with it for performing this action... etc" error message whenever I try to open an application. I don't know any other solution to fix this issue. I tried reinstalling
Windows 10 with MediaToolCreation.exe from my USB but since it's an application it doesn't start. The laptop is a Dell Latitude e6510, an old laptop but the unit is still good. It's out of warranty unfortunately. Would a System Builder be my solution?