I have Windows 7 SP1 on my Lenovo Thinkpad T530. I had default sound drivers from Microsoft installed with Win7 and it worked OK, except the sound was low. I installed Realtek drivers from Lenovo site and now I have an issue, when playing audio or video from browser - i have the sound and it's louder than it was before, but now I don't have audio when playing video files from my computer.
What I have done:
I have reinstalled the codec packs, reinstalled the drivers several times, cleaned all previous drivers with driver sweeper, tried several players and other codec packs - nothing has changed - sound is in the browser but not when starting video with some player. I tried also to change configurations in the player to set different output devices - but everything is the same, although output device is selected correctly.
As a solution I could rollback to default windows driver, but I want to know how to resolve such issues, where to look, what tools to use, etc.
Drivers seems OK, cause I have windows 8 on another hdd for the same laptop and when I booted there I checked driver version, etc - it's the same, but on windows 8 sound works OK everywhere.