when webroot does a scan of my computer do it use the internet while scanning my computer

 Hi alanmc3046
 
Welcome to the Community Forums.
 
The short answer is 'Yes' because all the definitions/whitelist that WSA uses are in the Webroot Cloud (WIN).  However, it can be used offline as it also uses heuristics as a method of determining threats and its ramps up its use of this protection/detection element when working offline, as well as using a set of 'special' definitions held precisely for this eventuality.
 
I hope that answers your question satisfactorily? If not or if you have further questions please post back and we will be please to try to answer them for you.
 
Regards, Baldrick

Hello alamc3046,
 
Welcome to the Forum Community!
 
EDIT: Looks like @ has this covered but I added more information if it's alright

 
The Webroot works from the Cloud from the internet it updates and protects you online and offline by scanning your computer.
 
Have a look here : http://www.brightcloud.com/platform/webroot-intelligence-network.php
You are protected as shown here below.
 

 
Yes Webroot works and scans from the Cloud which is online.
 
Best Regards,