Hello. So I just bought POP Classics from the Winter Sale and i have problem with the first 3 titles. In all 3 games after the start the mouse just freeze, In POP: WW and POP: TTT i can move in menu etc. with keyboard but not that luck in POP: TSOT. I tried almost everything. Compatibility mode/trying to change Vsync and buffering through the Nvidia Panel and also tried to change the mouse, with no Luck.
Did not have any problem with the previous games on Gog, so i am writing here for Solution.

My PC Config:
Windows 8.1 Pro 64-bit
i7-4770K
Nvidia GTX 780 @OC
16GB RAM

Thank you for your answers.

If you have Geforce Experience installed, try to uninstall it (don't forget to restart your PC).

Maybe another USB device is interfering. Try disconnecting all other USB devices. Also try another USB port for mouse and keyboard.

And reinstall the DirectX9 components, maybe DirectInput is broken somehow:
http://www.microsoft.com/en-us/download/details.aspx?id=8109
Run and extract the file to a separate folder, then start dxsetup.exe for installation.
Afterwards, download the latest DirectX web installer use it as well:
http://www.microsoft.com/en-us/download/details.aspx?id=35

Hello. Sorry for the late answer, but I had to travel. What happened was that somehow my computer got bluescreen, and after digging i found that Windows somehow really messed up with partitions etc. so I made a clean reinstall and now the mouse is working. So i don´t know what could make that problem, but thank you both for the answers.

You're welcome, thanks for letting us know. It's very hard to point the finger on a specific cause when Windows itself is broken. As long as it's working now, it also doesn't really matter.