Please Help?? Error 5 Input Output Error

[Gator24765]

Ok so everytime i try to unzip something in Stuffit Exander its loads then i get this error shown in the picture...



Can anyone help me out, it happens evertime i want to unzip something, in this case Adobe reader..

 

[Gator24765]

Here is the pic where it says error 5

 

[Gator24765]

bump

 

[cruzdrew]

Same problem here. Started after trying to install ubuntu on external disk.