How do I re-enable my thunderbolt port

Completely remove that unnecessary anti-virus software from your Mac using the vendor's instructions. Reboot your Mac. Unlike Microsoft Windows, those infestations do not run on the Mac and Apple has taken great pains to protect your Mac from malware via Apple Platform Security - Apple Support.

There has been a years long litany of users posting that their Macs don't work properly with ANY anti-virus software installed and we have consistently advised the anti-virus removal. Most report that their problems ended once the a/v software was removed.

Here's my 2¢ worth on that subject:

First, there is no reason to ever install or run any 3rd party "cleaning", "optimizing", "speed-up", anti-virus, VPN or security apps on your Mac.  This documents describe what you need to know and do in order to protect your Mac: Effective defenses against malware and other threats - Apple Community and Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support.  

There are no known viruses, i.e. self propagating, for Macs.  There are, however, adware and malware which require the user to install although unwittingly most of the time thru sneaky links, etc.   

Anti Virus developers try to group all types as viruses into their ad campaigns of fear.  They do a poor job of the detecting and isolating the adware and malware.  Since there are no viruses these apps use up a lot of system resources searching for what is non-existent and adversely affect system and app performance.

There is one app, Malwarebytes, which was developed by a long time contributor to these forums and a highly respected member of the computer security community, that is designed solely to seek out adware and known malware and remove it.  The free version is more than adequate for most users.  

Also, unless you're using a true VPN tunnel, such as between you and your employer's, school's or bank's servers, they aprovide false secutiry from a privacy standpoint. 

That being said follow the recommendations you've already been give to remove those apps.

If you're still having problems with the port try this: How to reset the SMC of your Mac - Apple Support  

There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX  Foundation and Permission Limitation. 

Starting in macOS 11 Big Sur and above. 

The Operating System resides in a Sealed and Read Only Volume that can not be opened by the User nor by Third Party Applications.

The only Entity that can open and modify or alter this Volume is Apple.

That would occur when a update or UpGrade is performed.

The Only thing this Antivirus software is protecting is the Bank Account of the Developers and for zero return to the User aside from the problems this software creates.

AntiVirus Developers purposefully Market their product to create a “ Fear Factor “. In so doing, creating a False Need for their Product.

The The Built in Security  is all that is required to protect the computer.