why is my internet slow in opening web pages with webroot running

Hello Deerack, welcome to the Community!
 
Have you tried to do a CLEAN re-install of WSA to see if that would help?  Here is how it is done, please follow the directions carefully.
 

• Make sure you have a copy of your Keycode
• KEEP the computer online for Uninstall and Reinstall to make sure it works correctly
• Download a Copy Here (Best Buy Subscription PC users click HERE)
• Uninstall WSA and Reboot
• Install with the new installer, enter your Keycode and don't import any settings as you can set it up as you like once it's done
• Let it finish it's install scan
• Reboot once again

Let me know it helps!
 
Also, how good a signal do you have with your WiFi?  If the router is on a different floor of the house or in a different room, you might have a weak signal anyway, and the usual un-noticeable delay from the Web Filter Extension is a bit more noticeable.