Today, (as a result of automatic updates) Windows Update decided to install a new important update (KB2454826), which resulted in my HDMI not working at all. I have an Asus UL30A, and I hook it up to a Benq G2420HD, using a HDMI cable. This worked perfectly before the update, now it doesn't work at all. I tried reinstalling the graphics driver (didn't work), uninstalling the KB2454826 update (didn't work), and reinstalling the graphics driver again (didn't work either). Any suggestions on how to fix this? Help appreciated! - Espen

Hi espenmbr, Since you have uninstalled the update KB2454826, the issue is still there. I recommend you try the System Restore to the time point before that update. Meanwhile, here’s the workaround about installing updates failure, refer to: Getting out of a no boot situation after installing updates on Windows 7-2008R2. Regards, Miya This posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.