Error 5002 When Getting Updates for Applications

Question

My iTunes 8.0 says that there are updates to 2 applications that I have. With no iPhones connected I push the arrow to get them downloaded, however, I get Error 5002 "We could not complete you iTunes Store request. An unknown error occurred (5002)".
I have tried turning the firewall off but no change and I have managed to buy a new application from the store which worked ok.
Any idea of a solution?

Answer 1

Here is what worked for me for when I got the 5002 message trying to update apps:
[please note before doing this it will copy any apps you still have stored on your computer back into the applications pane itunes, which is no problem because you can just delete any unwanted again/
1. right click on one of your itunes apps, then click "Show in finder"
2. Select all of that directory and drag back into the applications pane in itunes to put apps. It will ask if you want to replace newer versions - for me it made sense to click "don't replace"
3. Keep going until all apps are copied back in
4. Now click "XX updates available" (bottom right)
Hope it works for someone , certainly stopped that nagging slow annoyance that was rising.
[Note if you have multiple users you may need to do this for each users apps.}