Avast and Norton are installed

Hello everyone, 1 week ago i called a tech support company called America tech support to protect my computer, after that they installed 2 antiviruses Norton and Avast on my computer saying that they will both protect my pc now.

But the problem is, my computer is now working very slow after installing these antiviruses and i am not able to my company software on my pc too. Yesterday i was reading some article's online and found some articles on althow website, one of those articles claims that installing avast can slow down my computer article link here, and other article claim's that i need to disable avast's firewall to install the program Second article link here. i asked Avast support regarding the issue, but they are not replying to my issue directly.. Today my friend sad that i need to remove one of these antiviruses to make computer run smoother.. can you guy's tell me is importent to remove one of these antiviruses ? because i want to keep both.

GRR.:  Please excuse my ignorance, but was Avast approved by Norton to be placed in my Program Files? I recently was running Malware-Bytes and Norton and the same time, and my PC was slow. I no longer run Malware-Bytes but I use it to run manual scans. I would like to be asked before programs are arbitrarily  downloaded to my computer. Any suggestions? 

Thank you.

Avast is known to be pushed with (freeware) programs.  
https://www.ghacks.net/2017/11/19/avast-bundles-ccleaner-with-avast-free-antivirus/
for example: 

  Please excuse my ignorance, but was Avast approved by Norton to be placed in my Program Files? I recently was running Malware-Bytes and Norton and the same time, and my PC was slow. I no longer run Malware-Bytes but I use it to run manual scans. I would like to be asked before programs are arbitrarily  downloaded to my computer. Any suggestions? 

Thank you.

In my experience at the time, Avast was picking up on false-positives...

Thank you

 

 

Yes you can uninstall one, I recommend you uninstall avast, because it's more heavier and don't do much work.