Upgrading from os Sequoia to os Tahoe doesn't work

MacPracticeA

Bit poster
Hello- I am having a lot of issues updating a Parallels image from Sequoia to Tahoe, after all 'upgrade' related updates continually failed, I used a stand-alone Tahoe installer which DID install the operating system, which boots up, but that is when a whole lot of lag and failure begins.
-Apps don't open
-Parallels Tools fails to update
-Keyboard stops functioning appropriately
-Ultimately the instance will freeze shortly after this and I will have to issue a 'stop' command to try again.

I have updated memory, graphics resources, and have had no luck. Thank you for your help!
 
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