If you are asked to continue installation without flag settings in Roblox, first clean Roblox App Data and see if it helps. More fixes here.

Every Way to Fix Roblox Not Installing on Your PC It’s difficult to pinpoint the exact cause of the problem, so what we’ve done is create a series of steps that’ll touch on every possibility.

If Roblox is not downloading or installing on your Windows 11/10 PC, restart your PC and if that doesn't help, use the fixes discussed here.