1. Before installing Take Command v20.00.25, I close Everything (version 184.108.40.2062b (x64)).
2. Then I install Take Command, leaving the "Install Everything Search service (recommended)" option checked.
3. After selecting "Run Take Command 20.0", an older version of Everything is running (version 220.127.116.113b (x64)).
4. When exiting this version of Everything and starting up my previously installed version of Everything, I get a dialog like the one attached.
After this I get a User Account Control dialog whenever I start Everything (the version that I had installed before installing Take Command). This did not happen before I installed Take Command.
If I re-install Everything version 18.104.22.1682b (x64), then it works again as before installing Take Command.
I know installing the everything again fixed it. However what about the installer searching "Programs and Features" and if everything is not found - then install as usual, if it is - then ask if TCMD's version should be installed?