Neverending software license popup & test version of Photoshop

Hello everyone,

I know these are quite common problems and that many threads exist about that already but I tried many things suggested in the threads and nothing worked, so I have to go for it again...

Here's my story:

1) After a windows update (I'm using Windows 7; Version 6.1 (Build 7601: Service Pack 1)) I got the known issue of a neverending "your software license is checked" window popping up again and again and again when I tried to start Photoshop. I checked for possible solutions including suggestions from this thread: adobe software license agreement keeps popping up after installing CC 2014 apps . I did delete SLCache and OOBE folder and also deleted the software_agreement.xlm (don't remember the exact name)

2) Since this didn't work I did a system recovery to the point before the windows update. I got that eternal software license window pop up again.

3) Until then I was still using Adobe Photoshop 2015. So I updated it to Photoshop 2017 to see if this helps. This time I didn't get the software license window anymore but now I only got the test version although I have a full Creative Cloud subscription including PS. I could work with the 7-day-trial version and hoped that after this time it would switch to normal like the other apps. But now I got a testversion over note beneath the app's name and when I try to start it, I get the endless software license window pop up again.

Of course I checked the forums to get help and it seems like I have the issue of the never ending software license window combined with the false test version issue.

Following the tips of users from this forum, I have repeatedly

- tried to use a system restore point before the whole mess: no result

- deinstalled and reinstalled ALL CC apps manually, including CC desktop app itself: no result

- deinstalled everything using the AdobeCreativeCloudCleanerTool.exe; yes, I let it run as administrator and I repeated this like 3 times with reboots inbetween. I also deinstalled non-cc-related apps and adobe stuff.

- I even went into all kind of directories in the user-folder and deleted everything that had the name adobe on it (whole folders with sub-folders) and rebooted and installed everything again: no result. Whenever I download cc and install it and then install photoshop, it says my test period has ended and I get the neverending software license window.

I don't know if this information helps somehow: I run cc with the same account on a second computer (an iMac) and this works without any issues, photoshop is licensed and runs flawlessly.

Thanks for your attention & help