The note is on the screen and the files will not open. Before you consider paying, there are three things worth checking — and one thing to stop doing immediately.
The real question behind “can you clean my PC” is “will I lose my photos”. Here is what a careful clean-up does to your files, and how to protect them first.
Disconnect first, don’t pay the pop-up, copy your files before anyone touches the disk. What a real clean-up involves, and when to stop and call someone.