I had this happen recently in FS2004 and tracked it to a system sound setting.  One of the enhancement options is "normalize", a sort of AVC circuit (so you don't have one video you can barely hear yet the next blasts you out of the seat);  disabling this cleared up the FS problem.

Appears to have corrected the problem.

That works very well. I have 2 installs of FS2004, so I have to do things manually, except for scenery. I'm using FS Scenery manager for that, as it can add multiple sceneries at the same time.

Hi all.   I would like to know if the AMD 7 7700X is a good cpu for FS2004, FSX, and P3d 4.5.   I currently have an I5 10600K. I have compared both cpu's, and the AMD comes out on top. But I remember reading about AMD cpu's not werking great with the aforementioned simulators.   Would appreciate some information.    Thanks!

HaHa   I solved the altitude problem. It is the difference between ground level and my aircraft height on the ground. Stupid me.   I have totally rebuilt Tain, well at least a bit and now get the Andover arriving, parking and taking off again. Don't know what was wrong with the first build even ADE didn't come up with any faults. a mystery.   Thanks for the help guys. One day it will be ready.  

FSUIPC has no weather option, never has.

So, I tried again, KATL to KWRB in the King Air.  The sound stopped on the taxiway (it has done this before) and come back after a brief delay.  But, the application crashed later before getting on the runway.   Changed setting to uncheck 'run as admin', tried again.  I was turning base to KWRB and the application crashed.   So, not sure what I'll try next.   Otherwise: I know where to find fs9.cfg and transferred it from my old computer to this one.  Only thing it seems to do is cause the flight to start with all power off, which is desired. I've used fsuipc for a long time to get weather.  It's on my to-do list, if I ever get the darn thing to run. I may just give up on reverse thrust.  There is a bug in my throttle hardware, it slips inadvertently into reverse when the throttle is in idle, and that is annoying. Thanks for your help.  

I am VERY, VERY, HAPPY I don't need to do any of this to run my favorite sim.

You guys really need to stop with the Insults and the childish Invective. Just try to answer the OP's question the best way you can.

a small sampling-              

Over the years I have found FS2004 to be very finicky, its problems and solutions very system dependent.  I've spent hours tweaking vid driver settings, six months later i update the vid drivers and must start all over.  Solutions that work on one person's system may not work on another's;  there are few "absolutes", even "expert" articles do not agree;  ultimately do what works for you.   Some years ago I walked away from FS entirely for a while, tired of all the incessant tweaking, fiddling, stroking it took;  felt I spent more time tweaking than flying.  Install one scenery, screw up two others;  optimize a setting for this, it screws up that.  If modern iterations of FS have improved this situation, I would say that is their major achievement.

I use FSConfigurator (https://library.avsim.net/esearch.php?CatID=fs2004util&DLID=67713)   Once setup it gives tabbed access to all sections of fs9.cfg, you can annotate entries, backup and restore, etc.  There's also an FSX version.

Weird... Earlier on, you post     & now you criticize my advice!!   I'm using Windows 11, Mark!   As I said, 'FOR ME, IT WORKS!! without ANY issues!!   By the way, FS2004 works with both my AMD integrated graphics as well as my GeForce RTX 3050 GPU.   It's not MY settings, it's actually what has been posted on Running MS Flight Simulator 2004 on Windows 10 PC. - Microsoft Community  (in the original post, then also further down within the comments)   The proof is by installing into the FS2004 default directory -- FS2004 Does not work! By installing into any other directory, still does not work, without the patch & crack. I don't use AI Separation - I've not found a use for it at all.   Apart from your comments, I have not seen ANY, not 1, nada, ziltch complaints from anyone who has managed (or not) to get FS2004 working with ANY of the newer Operating Systems by using what I suggest!.   I've debated this issue with you, many times before, I'm not getting into a public debate with you again.

KEDW is one of the best default fields ever done in FSX. I have used it for years with only the addition of parking locations and aircraft add-ons. This is my go-to airport when trying out any new aircraft I download. At least for me, I'd put it back to default and enjoy it for what it is, a great custom built default airport.    

If I uninstall the Rikoooo photo real scenery and fly in from another close airfield the minute I get near KEDW the Sim Crashes.