Secure Boot on Win7 has been added by Microsoft + Edge not needed. Now NO BOOT !.

Secure Boot on Win7 has been added by Microsoft + Edge not needed. Now NO BOOT !. When enquiry made on MS support my Win7 PC got a download and Edge. Win7 Updates are past yet MS downloaded this update which caused my PC to be "NOT ACCESSIBLE" My Win7 Pro is x64 with EUFI working with all the latest up dates as supplied by Microsoft when supplied !. So why suddenly was a download initiated by Microsoft to a EUFI PC and Edge downloaded as well when not requested ?. The Pc was normally used as backup for documents on network !> NOW DOCUMENTS cannot be accessed !. **SO, what is Microsoft going to do to fix a problem that they caused ?. **