Windows 8.1 Audio and Video issues

I recently updated Windows 8 to 8.1 on my 2012 MacBook Pro and it now appers that Headphone/Line In have stopped working.
This only occurs in Windows mode, when running in OS X Mavericks the issue does not occur so I am assuming that it is a driver related issue rather than hardware.
I also have an issue with dual monitor setup, if I attempt to change the resolution or go from Dual to Single then back again, it fails to locate the second monitor again. Once again, this all worked with no issue before the 8.1 update and no issue occurs while running OS X.
Has anyone else experienced these issues and/or know how to resolve them?
I have gone through device manager and it indicates that all drivers are up to date.

i too have the same issue. I did a fresh Bootcamp install of Windows 8.1 64-bit on my mid 2011 iMac and my built in audio and headphones have stopped working on the Windows side. OSX Maveriks is ok.
i also went to the device manager and all of my audio drivers are up to date...still no sound.
i have uninstalled and reinstalled all audio drivers, disabled then enabled them several times...still no sound.
i have unistalled the graphics driver (i read somewhere else that there was an issue with it)...but still no sound.
can someone help us out?
NOTE: i have a usb audio dongle that works on windows. but it only controls my headphones. when i plug in the headphones into the built in audio jack on the iMac it doesnt work.

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have you found a solution to this?
My computer updated to 8.1 without my wanting it to, I have the same problems as you. I installed the video driver because the brightness was locked on what I had it. (the bar would move but did not change)
I searched for brightness and n585 and I was able to find a driver, now brightness works but HDMI still does not. When I plug in the TV both screens go black with all 4 options in the "project" screen.
*edit*
this worked for me i stumbled across this
I unplugged the power cable with the hdmi cable plugged in. Hit (windows key+p) scrolled to duplicate and it worked.I plugged in the power cord back in and it still worked.

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This could be a bug in your microSD. Please, try a genuine SanDisk, a slow one is sufficient for your Nokia because it is not that fast. Who made you current microSD?

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Hello, just wanted to pass on what I learned so that others can avoid the trouble that I've had to go through. Perhaps this may help someone who is stuck on the launch pad. :)
BOTTOM LINE: Info for the beginner. Audio and video not in sync in Premiere Pro CS3 V3.2.0
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>Audio and video not in sync in Premiere Pro CS3 V3.2.0
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Gerry Hampson | Blog:
www.gerryhampsoncm.blogspot.ie | LinkedIn:
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Hi @patd61 ,
Welcome to the HP Forums!
It is a grand place to find answers and suggestions!
For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide Learn How to Post and More
I grasp that when you watch Netflix your audio and video are out of sync.
Have you done all your Windows updates?
Have you ran the HP Support Assistant to aid with any HP updates ?
If you try a different browser do you have the same issue?
Here is a link a document from the Netflix help center that you may find helpful. audio and video issues
If you should respond back would you please include your exact model of HP notebook and your Operating System.
How Do I Find My Model Number or Product Number?
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Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

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Hi, I would like to assist you on this matter, however I would need some information from you first. I see that you are running windows 8. What is the make and model number of the computer that you are using? The windows 8 that you are using, is it a 32 bit or a 64 bit operating system? Please write back and I will be happy to do research on this issue.
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Waterboy71
Click the “Kudos Thumbs Up" at the bottom of this post to say “Thanks” for helping!
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
W a t e r b o y 71
I work on behalf of HP

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Hello,
I have a HP Pavilion G6 - 2292sa
The product no is C1Y93EA#ABU
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Hi Greum,
Welcome to the HP Forums!
I would like to take a moment and thank you for using the forum, it is a great place to find answers. For you to have the best experience in the HP forum, I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
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Follow the on screen prompts.
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Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

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Hi John,
Welcome to Apple Support Communities.
Take a look at the article linked below, it provides a lot of great troubleshooting tips that you can try, which will resolve most video playback issues in iTunes.
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