Edge overrides my Firefox browser AND mail overrides my outlook

[mrs q]

I had removed a "pup" malware from my windows 10

My default browser is Firfox; search engine google and mail is outlook

everytime I turn on my pc the defaults revert back to edge, bing and ms mail

I installed the edge deflector and it does send my search over to Firefox BUT the search engine still comes up with Bing
I rest all the defaults; still can't get rid of Bing

but I have to reset Firfox and set up outlook again when I turn on

I went to the apps page and did a repair and reset but still have to redo

 

[BigFeet]

You may still have lingering bits or damage from the malware. Even though the malware/pups have been removed, the damage they left may still be there. Registry settings may have been changed

 

[mrs q]

You may still have lingering bits or damage from the malware. Even though the malware/pups have been removed, the damage they left may still be there. Registry settings may have been changed

SO, how do I check the registry settings, please?