Windows 10 updates playing havoc on computers

Has anyone else experienced problems with the latest Windows 10 update?? I have 2 new Dell computers that came with Windows 10 installed and one older one that was updated to 10. Last week the same identical problem happened on all of them so I think it was an update.. On each of the computers I had MS Office 2010 (student version) installed, registered and was working fine...THEN...all of a sudden, each computer changed the MS Word, Excel, etc default program from the 2010 Office Version I bought to the new Office program that come of the computers and with the update to Windows 10 on the older computer. I never purchased, used or activated the new Office Program. Now I couldn't open excel documents without being prompted to purchase the new Office program. I uninstalled the trial Windows Office Program that was preinstalled (never activated) on the new computers and then was able to access my 2010 Office excel documents again.. but now every time I open one of them to edit it, the editing function is disabled and I am being told they might be a security risk?? I can bypass this notice and am able to edit again but this has happened to every MS Excel document that was created when using the MS Office 2010. A real pain in the rear.. Is this another MS way of forcing you into something you really don't want??? Anyone else experienced this...Maybe time to switch to Open Office..