2100 Trojans on my pc

I found 2100+ trojans on my system and they wouldn’t shred…malwarebytes killed them all. What should I have done other than install Avast Premium?

I found 2100+ trojans on my system and they wouldn't shred
I doubt that. The log most likely show evry place in the computer where the trojan has written code

What program found it?

and they wouldn't shred
Do you mean it could not be quarantined ? what program could not remove it

Hi…I couldn’t activate ROKU because the activation said I might have a virus.

The help url pointed to was www.winheal.com

They said the trojan was in csrss and wanted $99.50 to remove it. I hung up.

I downloaded malwarebytes and found about 2100 items in csrss I thought were trojans and malwarebytes killed them.

I originally tried to shred them but Avast worked on them but they persisted.

Any info or opinion would be much appreciated. I am starting to lose faith in avast. I suppose I should have made a copy of some of the 2100 items.

I am totally an amateur about malware.

If you want help follow instructions here >> https://forum.avast.com/index.php?topic=194892.0

I suppose I should have made a copy of some of the 2100 items.
They will be in the scan log

I activated malwarebytes and added rootkits to the scan. Malwarebytes found my system is clean. I have some notifications and found the output from malwarebytes showing some possible malicious sites AND I will publish part or all of the malwarebyte output if you think it is insightful to you or me.

Rootkit scan was turned off so I added it. Btw, how can I block websites that malware is suspicious of?