Normally even if programs (or the OS) update, it does not rearrange or change your desktop icons. And as was stated earlier, OS updates can be turned off permanently. Windows does NOT 'force critical updates' -- if updates are turned off, they're off, regardless of what Geek Squad said.
Allowing updates to occur in Sandoxie is just a waste of time and resources, only to be deleted when SBIE is closed, assuming you have it set to delete the sandbox every time the browser is closed. But
OS updates would not be run in the sandbox anyway, but outside it. Sandboxie is used mainly for running your browser, to protect you when browsing. It can also be used to run a program, but installing SBIE does not automatically run your entire computer in sandbox mode. Again, Windows updates would occur outside the sandbox.
It doesn't sound like you are being updated... it sounds like some rogue program, conflict, or process is causing problems with your DT.
But I'd first run
Adwcleaner (free) to check for viruses.
If none found, would open a command window (
run as admin) and type:
sfc /scannow
... so Windows can check for corrupted system files. It will auto-repair any it can, if corrupted files are found. This process takes a few minutes. When it's done type EXIT to close the window.
You can also try rebuilding your cache (lots of info on that - search this forum or Google it).
If none of those things reap an answer, it could be a program you installed around the time the issue started. Can go to
Programs & Features and let the window populate with all installed programs, then check the column for date installed, and see if you installed anything around that time. If so, try uninstalling it and see if the problem goes away. If so, look for an alternative program. Good luck.