I’ve received a number of emails from Larry Kuderick, who was trying to figure out why some listed app updates he had in Windows Phone Marketplace wouldn’t complete installing. But he’s found what he believes to be the answer to this problem, and he posted it in a thread on the Windows Phone 7 forum on Microsoft’s Answers site.
I think I might have an answer.
In another thread on this topic it was recommended that you delete the app, turn off your phone, remove your battery and then re-install the app. This did NOT work for me. Even after I had uninstalled all the apps waiting for an update I still got errors when I attempted to re-down load the app. However, I did get a new error message which I was able to look up and that sent me to this thread.
In short, go to Settings/Applications and check to make sure that Internet Explorer is set to accept cookies. I had changed this a month or so back because I didn’t want tracking cookies on my phone. Once I re-enabled cookies, I shut my phone down and restarted it. I was once again able to download apps. I’m assuming that your update problem is possibly not working because your cookies are turned off.
The bummer of this is that I had two apps which I originally downloaded when they were free and when I went to re-download them, they are now paid apps. (Bing Picture Downloads and Voice Recorder). So try checking the cookies setting on Internet Explorer before performing the ‘recommended’ step above.