I lost my sync abilities and un-installed the Activesync to find out the every time I went to re-install I got the same error.
I tried it again today and it worked, it hung up on 99% at first but I walked away and came back and it was fine, then hung up again at 92% but installed ok.
Hope that helps, try to go back and download software again today and it should be ok. Think Microsoft fixed their problem.
Good luck, I still can't get mine to sync.
Kim