Windows 10: How do i know what was changed on my computer from a virus?

I was downloading some stuff on windows version 8.1 and decided to face check the file with no anti-virus (nice), got ambushed with a virus who disabled Windows Defender and started doing some whack things in the background. I quickly managed to install malwarebytes and got the virus sorted out and hopefully destroyed(0 threats detected), but windows defender still wont open even though I tried force starting it through regedit permissions, I tried changing the antispyware values, but it wont open.
I am worried that whatever I downloaded changed my permissions to my settings. I believe the malware is gone now, and I know malwarebytes might be the reason that windows defender won't open (this app is turned off by group policy), but is there anything I can do to make sure my administrative settings weren't changed and if i am still at risk from the same malware? Why is the reason Windows Defender wont open and how can I fix them/make both antivirus programs open at the same time?

:)

 

computer virus

i think me computer has a virus when i start it up there are no short cuts or task bar( thing with the start button) any suggestions on how to fix it? thanxs


L: email-martinjurewicz@hotmail.com

 

Can't change value for Diagnostic and usage data

We would like to know more about this concern, kindly answer the following:

• May we know the build of the computer?
• Any changes on the computer prior to this concern?
• Aside from the suggested troubleshooting steps on this thread, what troubleshooting steps have you tried so far?

We will be waiting for your response.

 

Overclocking / Undervolting guide for Vega 56 or 64?

Here's a quick laundry list:

List of software to use for overclocking and testing
Examples:
Wattman (and how to find and use it, like an overview, including profiles)
Unigine Valley or Heaven (use this for quick testing while changing settings in Wattman and checking for stability / artifacts) ...just suggesting this
How to monitor cores / mem speeds and temps during testing (I've seen screen overlays, and others using GPUz)

Step-by step overclocking in Wattman
Fan speeds
Power limit
Temp limit
Voltages
Core speeds
Memory speeds