My Surface Pro took the update with no problem. But my Desktop computer refused to take the update. Turns out that an earlier update KB2919442 is required before you can update to 8.1B and it is often corrupted. Many people have reported problems with updating. Yesterday I spent 2 hours on the phone with an girl in India as she tried to get the update to 8.1B to install and she couldn't do it either. She bumped it up to Level 2 and scheduled me for a call from Level 2 for 9 am this morning. At 9:30 am I got a call from Windows scheduling telling me that due to extremely high call volume they rescheduled my call to 4:30 this afternoon. This update appears to be a disaster with thousands, if not millions, of people having problems with it. In my case, and many others too, the KB2919442 update is corrupted. In Control Panel / Windows Updates / Installed Updates is shows it IS installed but it can't be uninstalled. When you click on any other update a window pops up asking if you are sure you want to uninstall the update. But on this one update and this update ONLY it does not pop up like it should. Also, I cannot re-install the KB2919442 update because it says it is already installed. But, if I go to the Metro interface / Settings / change pc settings / Updates and recovery / Installed update the KB2919442 update is NOT installed. One place shows it installed, another says it isn't. Also my Skydrive still says Skydrive but in Programs and Features it shows Onedrive was installed but the name was never changed on folders etc. etc. Anyway, it appears that thousands and thousands of people are having problems with the update to Windows 8.1B and / or previous updates especially KB2919442.