since roblox doesnt support Windows 7 today, roblox may work unstable.
OR
Roblox new anti-cheat issue, it fixes itself after 1-2 days (for me), you can use microsoft store version
both microsoft store and website version crash on startup for me, both just close shortly after opening.
I have tried reinstalling both versions and even my Windows install and it has not fixed it. I guess I will have to stop playing ROBLOX altogether now. (studio does work but what good is that if you can’t even play your/others’ games outside of studio)
I have been in the exact same situation, until a few days ago. Now the ROBLOX game opens but it crashes at around 1-2 minutes and the ROBLOX UWP (windows store) version crashes upon signin/signup. Roblox Studio still works as well.