I recently installed a new hard drive and can't open my archive.pst and personal.pst files. I copied these from my old hard drive information into the same location on my new drive C, but when I double-click I get a message that says: "unable to expand the folder. The set of folders could not be opened..." I read on another answer about assuring that I have the correct copy of inetcomm.dll and I have done that (although my knowledge is limited and this may, in fact, have nothing to do with my problem). I am not completely computer illiterate and am now getting frustrated because I can't get at my old email addresses. Any help would be greated appreciated.