I had the same experience trying to install Photoshop Elements 9 on my new Windows 11 system. In my case, upon completing the install, I received two error messages stating that "A driver cannot load on this device". I ignored the messages and tried restarting my system but it hung while trying to start Windows. The solution in my case was to reboot while holding down the <F2> key; I entered troubleshooting mode and then chose the option to boot to the command line. Using DOS commands I renamed three files containing the problematic drivers in order to hide them:
windows\system32\drivers\PxHlpa.sys > PxHlpa.hide
program files (x86)\common files\sonic shared\PX Drivers\pxhelp64.sys > pxhelp64.hide
program files (x86)\common files\sonic shared\PX Drivers\pxhlpA64.sys > pxhlpA64.hide
After hiding these driver files, I was able to once again start Windows normally.
Photoshop Elements 9 seemed to open fine but at that point I decided I didn't want to discover other incompatibilities later so I uninstalled Elements 9 and upgraded to Elements 2023 which has a more usable appearance on a 4k monitor anyway.