2. Fill out the form. You may need to sign in to your Microsoft account.
3. In the lower part of the form make sure that you fill out the fields as shown in the attached screenshot. You can also upload the file rfusclient.exe. You can find it in the C:\Program Files (x86)\Remote Utilities - Host\ directory. If it's not there - restore it from Quarantine in Windows Defender settings.
4. Click Continue. On the next page confirm form submission.
P.S. Microsoft has always been quick to resolve FP issues. Let's see if they manage to fix this one asap.
Yes, we understand the problem. We have dedicated personnel that deals with false positives and regularly sends reports to a/v companies.
Currently, we are aware only of the AVG problem and we are already trying to contact them and resolve this issue. There haven't been reports about Avast and VirusTotal reports show that Avast detection is clean. Do you have any screenshots of Avast's detections?
P.S. I will move this topic to the Antivirus sub-forum.
Another way to go would be using the callback/reverse connection. This is also a direct connection type, only in this case it is the Viewer that should be accessible externally rather than the Host (that's why it's "reverse"). Might not be an option if you travel often though with the laptop where the Viewer is installed.
Answering your question regarding where RU Server should/can be installed - it is highly recommended that RU Server is "stationary" , that is it is a dedicated computer with a static IP address, or a DNS name, running 24/7. Perhaps, it's an overkill for just accessing a single computer.
If you experience issues with speed/performance, you may try tweaking some settings. This article may help.