Maybe this isn’t the right forum but unfortunately there is little help from the otherwise excellent support with this.
For the last couple of days, it has not been possible to use the Wolfram Desktop on Windows 8. It hangs after a few minutes. I have tried this on various networks and on two different computers with the same result.
The Wolfram Cloud developers recently identified an issue that caused issues with signing into the Wolfram Desktop. This problem was resolved yesterday, so you should now be able to sign into the product. Please let us know immediately by contacting Technical Support if you are still unable to do so.
This problem only occurred with the Wolfram Desktop, and not other products like Mathematica or the browser based version of the Cloud. Steps have been taken to make sure that this does not happen to the live version of the Wolfram Desktop in the future.