I know we've covered this recently but don't have time to find the other thread. T-Clock Redux works great in Win 10, currently I am on 20H2. My instructions for "installation" are here (it isn't a run-installer kind of install), these are for an older release but the process is exactly the same:
How to set up T-Clock 2010 build 95
1. Copy the entire T-Clock folder (contains Waves, Win32, x64 folders) into Program Files
2. Run clock.exe from the subfolder of the proper bitness
3. Right click and choose T-Clock Properties
4. On the About tab select Start T-Clock when Windows starts
5. On the Clock Text tab, choose Marlett, size 8 neither bold nor italic
6. On the Time Format tab, check Custom Format and set it to hh:nn:ss POSIX\ndddd mmmm d, yyyy
7. On the Mouse tab, set the Action to Show Calendar and set the tool tip to dddd mmmm d, yyyy
Steps 5-7 are my preferences, replace with whatever you want.
