Microsoft has made things a bit easier for those who are having a difficulty while updating their Windows Phone 7 operating system.
When you try to update your Windows Phone 7, if you receive one of the following error codes:
800705B4: The timer ran out on what we were trying to do.
80180080: We couldn’t update your phone because your operating system might be corrupt,
then try using the Windows Phone Support Tool. The Windows Phone Support Tool is an application that fixes problems that prevent your Windows Phone 7 from updating successfully.
To learn more on how to use this tool and to download it visit KB2530409.