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I have upgraded the OS on a Panasonic Tough-book CF-30 (F) mk2 laptop and have re-installed all drivers from Panasonic's Support website. I have installed the sound driver that Panasonic says should be on the machine, but I have no sound. Device manager shows all good on the sound card and driver, and when I try to play a test sound through control panel, it looks like I should have sound playing, but it is like the sound is muted somehow. I checked the task bar sound icon and it says it is set to max (100).I do have 2 unknown devices that do show in device manager.First, any suggestions on the sound issue.Second, could the unknown devices have anything to do with no sound?Any help is greatly appreciated.PS: The sound worked fine before the upgrade to Vista, so I assume it may be a driver issue. You were correct.

Not only were the issues with the hotkey driver and application, there is a fix for this that I got from Panasonic support. After following this guide, all works.

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Gonna make this post resolved!See Below:Note: I have included links to Drivers / Utilities for Panasonic Toughbook model CF-30 Mk2 in case you need to download them.If this unit has the original factory image, these files will already be in the C:UTIL folder on your hard drive.Please use the following steps to restore the sound functionality.1. Remove any previously installed Hotkey Application -Go to Start Control Panel Programs and FeaturesRemove the following applications (if present) - Hotkey Appendix, Hotkey Driver, Hotkey Settings.2. Default BIOS -Restart the laptop, and go into the BIOS setup (press F2 at the Panasonic screen when it starts powering back up).On the Exit menu select Load Default Values. Then Save and Exit3.

(Re)Install Hotkey Applications -Link for Hotkey Settings Application:Run the file to extract its contents then run 'c:util2hkeysetsetup.exe' to install the application.Link for Hotkey Appendix application:Run the file to extract its contents then run 'c:util2hkeyappsetup.exe' to install the application.4.