SD card coruption problem

Hi I was taking photos with my digital and when we looked at them on the camera they were fine but when I tried to load them onto the pc it came back with an error saying the file was corupted. Then when I looked at the pics on the camera again they had been altered and werent the same.
I then looked at the file on my pc again and the scan disk had one file on it that I couldnt delete or rename its filename was a ex.if file with a square a beta sign a hash sign and a square ex.ifif that makes any sense. any way I can remove this?

 

Thanks I'll give it a go but I have a feeling I'll need a new SD card.

Cheers