Do you see any other unidentifiable software appearing in Task Manager? Something named differently than "Software Informer".
Before the downloads started being blocked did you download any new applications or updates. Could be that something snuck in along with the desired software. And has now taken over.
Here is a link that will help you get a list of what all is running:
There are other similar links available so do read and research before trying anything via Powershell
The most straightforward method is to open Powershell and enter "Get-Process" (without the quotes).
Look at the ProcessName column to the right of the output.
Key is to first identify the culprit process and once identified, then you should be able to stop it.
Unless the process is malware and able to block such attempts. TBD.....