Request for assistance - Can't install v3.29 on Windows 11

[Clive]

Hello,

I'm sure I had this problem previously but can't recall the solution.

I'm running v3.28 on W11 with no problems (and 3.29 on W11 on another 
computer). When I double-click on the setup file obtained from github 
via square penguin's installer link, the cursor hourglass runs for a 
couple of seconds then nothing happens. I generally use the x64 copy but 
have also tried the x86 and the same happens. I don't get as far as the 
UAC prompt. I've disabled my anti-virus (Bitdefender) but again, 
nothing.

Can anyone offer any guidance please?

Clive