So, if your firewall settings has enabled remote access, then you might be in trouble. Go to the computer’s Control Panel to check the Firewall settings. 5. Use Task Manager to detect access. Another way you can tell if someone is remotely viewing your computer by assessing the programs recently opened from Window’s Task manager.
Access Your Computer's Files From Anywhere In The World Sep 24, 2016 How To Remotely Access My PC From iPad Jun 03, 2018 16 Best Free Remote Access Software Tools (July 2020) Jul 01, 2020 How to remote access my iPhone interface from my PC - Quora
Should have added that you need to allow remote access on the remote machine. Right mouse click my computer, select properties and then the remote tab. By default the administrator who does this will be allowed access. You can create other users and allow them access also, with less than admin rights.
Three Ways to Remotely Monitor Someone Else's Computer Can be installed remotely if company uses ActiveDirectory (paid version only). As an admin, you can log into a web-based control panel to view activity usage stats within minutes after setting up How to Remotely Troubleshoot Your Relative's Computer May 25, 2018
You can remotely connect to your home or Office PC from anywhere anytime using tools like on premise R-HUB remote support servers. It allows unattended remote access plus works on all platforms
How to Connect Remotely in Windows 10 - dummies