After upgrading to WIN10 or installing a new features update, sound issues may occur where DRIVERS on old & even out of support drivers need updating.

RESEARCH APPROACH — For some issues, the solution many not even be related to device settings/drivers — but interference by something completely unrelated … that is most important reason why research is needed.

1. Thoroughly RESEARCH issue with Vendor & Google & U-Tube searches (gather multiple ideas & solutions)

2. DELL or another vendor’s user forum will likely share most popular solutions that work (as that is where I found answer)

3. Look at multiple solutions & capture best links in Word document (in case there is need to reference again)

4. Now try easiest & safest solutions 1st that you can easily UNDO (esp. if no WIN10 drivers exist from vendor – as an older laptop may not be supported for WIN10)

5.  After trying any suggested fix & if it does not work — immediately reset back (so you don’t forget)

6. Keep researching & trying multiple sources when solutions don’t work (be careful of “driver update” sites where some malware authors take advantage & trick folks … or there may be a free solution rather than paying for special drivers)

7.  Document any special solutions in WORD document or other technique in case needed later in future (that’s one reason I’m sharing in blog)

PERSONAL EXAMPLE: A few years a nicely refurbished Dell Latitude e6400 was received as a gift.   Back in May, I updated O/S from WIN7 to WIN10 in preparation for JAN-2020. And while WIN10 runs great there, I just learned that vendor only supports drivers thru WIN7 & that is understandable on old device.  In one of the WIN10 feature updates (v1809) a new issue occurred where a strong signal was being sent strong signal every 5 seconds that buzzes any audio sound output (distracting on music/movies).   Yesterday, using Dell’s Support Assistant I was able to flash to more modern BIOS … and by unchecking eSATA setting in BIOS instantly resolved all issues on SOUND

After finding solution, I wanted to share my thanks on the vendor’s website & that solution also works for v1903 as well (on page 6 of thread as follows):

https://www.dell.com/community/Latitude/Latitude-E6400-with-Windows-10-updated-to-1803-sound-now-is/td-p/6079998

1. Load DELL Support assistant (automated software at Dell’s main site)
2. Let it recommend any updates
3. Select only the latest available BIOS (as that is specific recommendation for this issue)
4. Let PC re-flash & then power off (full shutdown for a minute or so)
5. Power on & immediately press F2 to invoke BIOS menu
6. Be careful & navigate to disk controllers section
7 Find the eSATA capability & uncheck
8. Save changes & system will boot up to WIN10 (thankfully all sound issues all cleared up)