Start 11 Repeatedly Asks for Activation

An activation prompt means the product genuinely is not activated. There is no half licensed state where some features quietly lapse, so what you are seeing is the activation state being wiped rather than anything wrong with your key or your account.

Fences and Start11 both doing it is the useful clue. They share the same activation mechanism, and each product keeps its licence files in its own folder under %ProgramData%\Stardock. Something on the machine is removing them, which is why re-entering the key works and then stops working.

The usual cause is a cleanup or optimiser tool. Some of them have bugs that clear the activation state as unneeded files, and IObit Advanced SystemCare has turned up in a thread with exactly this shape, though any of that family can do it. Do you have one of those installed, particularly on a schedule?

If you do, deleting the folder again will not hold. Add %ProgramData%\Stardock to that tool's exclusion list first, then activate once more so the files it writes are the ones that survive.

The other thing worth ruling out is Controlled Folder Access, under ransomware protection in Windows Security. It stops our apps writing files where they need to, and that produces the same never sticks behaviour.

I don't have any optimizer tools on my pc the only thing i have on here is Emisoft Anti-malware and that's not the same thing unless it's periodically deleting or quarnteening the registry file without saying it. i'll activate the software it'll be fine for like a week or two give or take then it starts asking to be ativated again when i notice my taskbar reverts to the crappy windows 11 default.

Worth separating the two things that produce that prompt, because they need different fixes. A successful activation writes a license.sig file into the product's own folder under %ProgramData%\Stardock, so Start11 puts one in %ProgramData%\Stardock\Start11 and Fences keeps its own alongside it.

Next time it asks, look in there before you reactivate. If the file has gone, something on the machine removed it and the only question left is what. If it is still sitting there and you are being asked to activate anyway, nothing is deleting anything and the check itself is failing, which is a different problem with a different answer.

For the first case, Emsisoft keeps a timestamped quarantine list, so compare the date it last broke against what is in there. One detection on a licence file is all it takes. If you find anything, %ProgramData%\Stardock is the folder to exclude, since it covers both products at once. A gap of a week or two between failures also points at something scheduled rather than something happening at every boot.

On why a security suite can be involved without being a cleanup tool: our activation and update checks run inside explorer.exe rather than in a process of their own. Neil confirmed that in February and said it applies to almost all our apps. Anything filtering what Explorer is allowed to do or reach can land on the activation check without ever touching a file.