Shoutbox

Both errors are being caused by the same thing; some process is apparantly using msnmsgr.exe... This means that 8.5 installed OK, except for that one file, which could not be replaced and you still have the version of the file from MSN 7.0/7.5

I would have recommended trying to rename the file first rather than deleting it (which I usually have more success with), or downloading a small utility called Unlocker which manages to remove a processes "grip" on a file freeing it up for deletion etc.