Can’t remove screws from pc fan

I’ve been trying to remove the screws from my PC fan and I heard the spring come undone for one of them. I was able to unscrew the other with ease but when I try to unscrew the other side, it won’t come undone. I think it has to do with the bolt at the base spinning along with the screw. I’m struggling to put the screws back in at the moment. Any advice?

I’ve been trying to remove the screws from my PC fan and I heard the spring come undone for one of them. I was able to unscrew the other with ease but when I try to unscrew the other side, it won’t come undone. I think it has to do with the bolt at the base spinning along with the screw. I’m struggling to put the screws back in at the moment. Any advice?