In all seriousness though, for those reading this post in the future with the same issue, please just update to a supported version of Windows. No disruption in your workflow or feature set is worth leaving your internet connected computer totally vulnerable to ransomware and other forms of malware which can easily steal your credit card details or account credentials.
As of 2023-01-10T00:00:00Z, Windows 7 is no longer receiving even the most critical of security updates. I’m sure Roblox will do a stellar job as per usual in the supporting legacy devices section, but that doesn’t mean staying on Windows 7 is not just advertising yourself for targeting by commodity malware.
If Roblox Player won’t work for Windows 7 anymore, then maybe you should try a OS Emulator? Like a virtual machine, or maybe a mobile emulator for more efficiency. I do agree with other posters here though, you should just upgrade your windows. 7 came out over a decade ago.
Adding onto this to say that I’ve been helping so many people revert their playerChannel due to this bug. That patch is not installable for the users dealing with this issue, and I suspect that even those fortunate enough to have it may still receive the same error message.
Huh… the 64-bit client is still running on my Windows 7 system. I am certain that I do not have KB4534310 installed:
And I do not have that streched wallpaper glitch that was introduced with that update. The client works without any workarounds at all. Maybe that update pack which is UpdatePack7R2-20.12.10 to anyone in need installed the necessary patches in some hidden manner? I don’t really know.