I have a Lenovo Y50-70 laptop, which came with Windows 8.1. I upgraded my RAM to 16 GB and had no problem for weeks. Later, I had to uninstall my CorelDraw program, but I also uninstalled Corel Graphics Windows Shell Extention and Lenovo Pokki start menu. That messed my laptop and I got watermark in my Desktop.
I had to reinstall the CorelDraw to fix that watermark. It shows Activated in "System", but every 30 minutes, PC Settings pop up and says I have to activate. When I click "Activate Windows Online" it says: "Windows Can't Activate. Try again later."
I already tried to enable/disable Secure Boot from Motherboard BIOS settings and also I used,
slmgr /ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
command to activate. Every time it says Windows is activated successfully but still I get that PC Settings Annoying message to Activate Windows. I really don't want to use One Key Recovery on my laptop, I appreciate any help to fix this issue.