Which GPU driver are you using? If the latest version is giving problems then reverting to an older driver might work. NVidia sometimes introduces bugs on new updates which have problems with certain games.
Also try turning off third party stuff which loads e.g. using Autoruns to check for a...
I haven't used RDR2 for a while on my W11 desktop PC. I started the Rockstar games launcher today which updated itself then immediately did a large RDR2 1.5GB game update download to update the game to build 1491.50. All works fine.
I upgraded a 10 year old non-complaint PC last week as follows:
Download the latest Windows 11 ISO file and mount it as a virtual drive
Turn off net access
Run setup.exe
On the first screen click 'Change how Setup downloads updates' and select 'Not right now'.
Replace...
I ran that tool on my Intel i7-13700K CPU (Raptor Lake 13th Generation) with the latest BIOS only issued a few weeks ago. It shows the system has no meltdown protection and the 'Enable Meltdown Protection' button has no effect. Why no meltdown protection?