Is Avast still blocking the IP address at bootup? It probably is because I'm still getting the Insecure connection warning from Firefox.
Free Windows games are ad supported so it is possible that it is calling home to connect to a related Microsoft ad server.
You can use CCleaner to view Windows Startups, Tasks and Installed programs. It allows you to Disable or Delete Startups and Tasks.
If you would like me to take a look at those...follow the directions below.
Use CCleaner to remove Temporary files, program caches, cookies, logs, etc. Use the Default settings. No need to use the
Registry Cleaning Tool...risky. Pay close attention while installing and UNcheck offers of toolbars....especially Google.
After install, open CCleaner and run by clicking on the Run Cleaner button in the bottom right corner.
CCleaner - PC Optimization and Cleaning - Free Download
Post the three lists mentioned below using CCleaner.
Open CCleaner and click on Tools. Choose Startups. On that page you will see a list of Windows Startups and at the top tabs for each browser and Scheduled Tasks.
At the bottom right of that page you will see a button when clicked will allow you to Copy and Paste the list of Windows Startups and Scheduled Tasks into your next
post. Please do that.
Open CCleaner and click on Tools. Choose Uninstall. On that page you will see a list of programs installed on your computer and at the bottom right of that page you
will see a button when clicked will allow you to Copy and Paste that list in your next post. Please do that.
Suggestions not related to what Avast is blocking:
I suggest installing an ad blocker such as Adblock Plus. Once installed, click on the ABP icon at the top of
the browsers it is installed on and choose Filter Preferences. UNcheck the box next to Allow some non-intrusive advertisements.
Adblock Plus :: Add-ons for Firefox Adblock Plus - Chrome Web Store Adblock Plus for Edge browser
Adblock Plus for IE
Block Third party (ad/ tracking) cookies from installing. Once blocked, run CCleaner to delete the existing ones.
How to disable third-party cookies in all major web browsers