I just downloaded and installed MS Teams (Teams_windows_x64.exe File version 126.96.36.19961 93.5MB) on my son's HP Laptop i3-6100U CPU @2.30 Ghz 6GB RAM running Windows 10 64-bit. No other apps are running (I do have Microsoft 365 installed), however after the white window that says "Installing Microsoft Teams..." then switches to say "Loading Microsoft Teams" with the 3 counting dots moving, but that is all it ever does. The screen never gets to the login screen (I installed the same on my wife's laptop which works fine as is on my desktop PC). It just sits at that loading screen endlessly.
When looking at Task Manager, I do see the MS Teams process which has 4 sub-processes - 1 says Loading Microsoft Teams, and 3 says Microsoft Teams. None are showing any CPU % or Disk % usage. The only items that show activity are Memory (105MB total) and 0.2% GPU
I have already uninstalled 3 times, removed everything from %Appdata%\Microsoft\teams directory after each uninstall and rebooted several times after each. Result is the same after each install attempt.
As a point of reference, when trying to run Teams, the current overall CPU usuage is only 30%, Memory is 52%, Disk is 6%, and the laptop is running over wifi and does connect to internet (as I tested Edge and it works fine, as does Outlook and all other Office apps.