I BELIEVE YOU ARE ALLOWED 3 DEVICES. SO UNLESS YOUR USING ALL 3, THEN SAY YOUR USING ONLY 2, THEN YOU CAN ADD YOUR OTHER PC.

No. My account only allows 1 PC. So how do I upgrade it to allow more than 1 mid-term ?

In that case you will have to talk to your subscriber.

Problem is, Webroot Customer Service does not answer customer requests, unacceptable behavior.

I may throw in the towel with them and find another provider. 

Did you buy Webroot straight from Webroot,or through Best Buy, or google play store,or by a other means?

From Webroot

I have Webroot through Best Buy. The reason being, not only do they allow 3 devices with my 3 year script 1 price, but Best Buy will tune up, & clean my pc 24 7 365 days. Also will help with any issues I'm having. 

Hello @joemvcnj 

Please contact Webroot sales and they will be happy to help you!

Thanks,