Quicktime wont play anything

Question

I recently downloaded a .mov file and it played fine, but now quicktime suddenly stopped playing it. I double click on the file and it takes a while for quicktime to even open and when it finally does it wont play the file. It opens and the movie file's name is changed to "Untitled 2" in the taskbar. There is no audio or video either. Then when I go to File->Open File and click on the one i want to play, it takes a second and then an error message appears that says:
Buffer overrun detected!
Program: C:\Program Files\QuickTime\QuickTimePlayer.exe
A buffer overrun has been detected which has corrupted the program's internal state. The program cannot safely continue execution and must now be terminated.
I've uninstalled and reinstalled quicktime several times and I also downloaded the latest Quicktime/iTunes and it still gives me this message. I also can't play any other of my files in quicktime.
Anybody know what to do to fix this?

Answer 1

I recieved the same thing a couple of months ago and started to research it but never followed thru with it. I monitored it with a firewall at the time and still have what I jogged down in a notebook.
A computer you were communicating with at IP address ** has attempted to access a different port then exspected. Port 6970, this port is commonly used by Gate Trasher Trojan. Gate Trasher Trojan is a Trojan Horse program. This port 6970 is also used by Real Player and QT to recieve streaming media data.
That is what I had written at the time, certainly not a fix, but may provide some insight.