Folder/Trash Problems

Hi all,

A folder that contained a load of audio files (called "Releases") suddenly wouldnt show its contents and I'd get the spinning wheel for a good 30 seconds before I could do anything on clicking the folder.

I moved it to the trash and tried to empty with no luck. Whilst the folder is in the trash, the same problem persists and I still cannot access or see any of its contents. If I search for any of the files within this folder in Finder/Spotlight they appear as being where they should be; in the folder thats in the trash. I can listen to the audio files from my search no problem, but I can't open the containing folder.

I've tried to show all hidden files, and to securely/force empty my trash but I get this error message:

The Finder can’t complete the operation because some data in “” can’t be read or written.

(Error code -36)

Also, on performing the force empty trash, the folder in question changed name and did again on a second try.

I honestly don't know what the problem is.. Could it be a virus of sorts? Hopefully this made sense! I'm currently runningMac OS X Lion 10.7.5 on a Macbook Pro