I found cautionary YouTube videos on switching to Win 11.
Run Regedit As Admin: CMD prompt
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\BitLocker
Create DWORD (32 bit) value: Name “PreventDeviceEncryption” Value 1
If already encrypted, Start >> Settings >> type in: Control Panel >> System and Security >> Bitlocker
From there it is possible to force decryption and to tell Windows don’t encrypt.
As far as the Bitlocker part, I did have registry entries for Bitlocker even though I was only on Win 11 Home. Among other things, the folks who use Bitlocker to set up a ransomware situation will at least initially be blocked, and if you have a good security setup it will block an internally triggered edit of registry settings by a web-based hacker. (If a hacker thinks you are worth the effort, this isn't a foolproof solution.)
I can't find my full list at the moment. Here are a few things that were recommended:
Start >> Settings >> Win Update >> Check for Updates >> Delivery Optimization >> Download from Other PC (turn OFF)
Start >> Settings >> Networking >> Settings >> Hotspot 2.0 >> Online Sign-up (turn OFF)
Start >> Settings >> Privacy and Security >> Options (huge list of candidates for DISABLE or turn OFF)
Start >> Settings >> Privacy and Security >>Diagnostics and Feedback - several candidates on this page to turn off diagnostic feedback
(In particular, "Inking and typing" - it would let MS develop your typing profile.
Start >> Settings >> Privacy and Security >> Location settings (several candidates to turn off selectively)
Although they are moving away from Cortana and on towards CoPilot, you MIGHT find Cortana still on a system. If you found her to be as annoying as I did, you can open up Cortana and strip it of certain abilities such as Deny Microphone use, Background Run OFF, Deny Run At Login. But if I recall correctly, you couldn't actually uninstall Cortana. Though with CoPilot as a successor, who knows?
IF you have CoPilot on your system, then
Start >> Settings >> Personalization >> Taskbar (where you can toggle off CoPilot as a "permanent" taskbar item.)
If you are gutsy and understand to not randomly explore too much, then
Start the Group Policy Editor by Win + R and run "gpedit.msc"
User Config >> Admin Template >> Win Components >> Win Copilot.
You will be able to doubleclick "Turn Off Copilot"
Finish by clicking Enabled >> Apply >> OK - and policy editor will exit.