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Problems with Autosave on Windows 10/11 : The Answers!


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Hi Pete
I have amended my PC settings and used FSUIPC functions to eliminate the autosave issues under windows 10
and thought it might benefit others, subject to your approval
For me the 2-3 second hesitation was caused by windows antimalware service (Windows Defender)
using a lot PC  CPU/Memory resource. Unfortunately if realtime protection is turned off
manually it is automatically set to ON when the pc is next started.
However, Defender's settings options allows the user to add exclusions for:
specific folders / file types /processes and this was the fix I needed and it permanently
stops Defender causing the sim to pause.
If you have installed your own 3rd party antivirus/anti malware software check that
windows defender "realtime protection" is OFF
To access the settings screen
open the win 10 action center and select all settings
then Update and Security
select windows defender
select add an exclusion
The only exclusions actually needed was process-  adding the executable file for each sim,
I was taking no chances and included folders & file types to be 100% certain defender
does not quarantine/check any sim files
In processes I added
In folders I added;
c:/drive .... documents/folder names (where saved flight files are kept)for both sims
main install folder for each sim
In file types I added;
The hesitation was reduced significantly to a micro-pause (sometimes none) in both sims.
Next: non-deletion of autosave files
After reading the previous posts I had not been aware of the option to manage PMDG saves so;
For FSX-SE and prepar3d I followed the guide in FSUIPC documentation (thanks Pete)
and added lines to the sim FSUIPC.ini file to cover the 737/777 from PMDG
Your folder path will be different to mine. The short path did not work -
I added the fullpath instead.
AlsoManage1=H:\P3dv25\PMDG\PMDG 737 NGX\PanelState\*.fxml.sav
AlsoManage2=H:\P3dv25\PMDG\PMDG 737 NGX\PanelState\*.fxml.fmc
AlsoManage3=H:\P3dv25\PMDG\PMDG 777X\PanelState\*.fxml.sav
AlsoManage4=H:\P3dv25\PMDG\PMDG 777X\PanelState\*.fxml.fmc
AlsoManage1=J:\FSX Steam\steamapps\common\FSX\PMDG\PMDG 737 NGX\PanelState\*.FLT.sav
AlsoManage2=J:\FSX Steam\steamapps\common\FSX\PMDG\PMDG 737 NGX\PanelState\*.FLT.fmc
AlsoManage3=J:\FSX Steam\steamapps\common\FSX\PMDG\PMDG 777X\PanelState\*.flt.sav
AlsoManage4=J:\FSX Steam\steamapps\common\FSX\PMDG\PMDG 777X\PanelState\*.flt.fmc
To avoid the Autosaves accumulating out of control in FSX-SE I added extra lines
and found it worked well.
Use your actual "user" name not %username% otherwise I don't think it works
AlsoManage5=C:\Users\%username%\Documents\Flight Simulator X Files\*.FLT
AlsoManage6=C:\Users\%username%\Documents\Flight Simulator X Files\*.FSSAVE
AlsoManage7=C:\Users\%username%\Documents\Flight Simulator X Files\*.WX
It doesn't affect manual saves or the previous flight files generated by FSUIPC
With prepar3d Autosaves do not accumulate out of control.
I have no idea why only FSX is affected
I recorded two short videos for FSX-SE to show this working.
using basic default scenery and the other with FTX global and Active Sky next weather
Autosave setting - 2 saves every 15 secs helps show this working.
YouTube :
Here is my FSUIPC log created when seting up the vids.
I paused the sim while setting up the folders etc
before loading the 737. No simconnect disconnect, no errors
********* FSUIPC4, Version 4.945 by Pete Dowson *********
Reading options from "J:\FSX Steam\steamapps\common\FSX\Modules\FSUIPC4.ini"
Running inside FSX Steam Edition on Windows 8.0
Module base=66160000
User Name="xxxxxxxxxxxx"
User Addr="xxxxxxxxxxxxxxxxxx"
FSUIPC4 Key is provided
WideFS7 Key is provided
       15 System time = 21/09/2015 09:40:38
       15 FLT UNC path = "\\HOMESIMPC\Documents\Flight Simulator X - Steam Edition Files\"
       47 Trying to connect to SimConnect Steam ...
       47 FS UNC path = "J:\FSX Steam\steamapps\common\FSX\"
      156 LogOptions=00000000 00000001
      156 -------------------------------------------------------------------
      156 ------ Setting the hooks and direct calls into the simulator ------
      156 --- CONTROLS timer memory location obtained ok
      156 --- SIM1 Frictions access gained
      156 --- FS Controls Table located ok
      156 --- Installed Mouse Macro hooks ok.
      156 --- Wind smoothing fix is fully installed
      156 --- All links checked okay
      156 -------------------------------------------------------------------
      156 SimConnect_Open succeeded: waiting to check version okay
      156 Trying to use SimConnect Steam
      640 Running in "Microsoft Flight Simulator X", Version: 10.0.62615.0 (SimConnect: 10.0.62615.0)
      640 Initialising SimConnect data requests now
      640 FSUIPC Menu entry added
      656 J:\FSX Steam\steamapps\common\FSX\flights\other\FLTSIM.FLT
      656 J:\FSX Steam\steamapps\common\FSX\SimObjects\Airplanes\Aircreation_582SL\Aircreation_582SL.air
    10640 System time = 21/09/2015 09:40:48, Simulator time = 09:40:38 (16:40Z)
    10640 Aircraft="Aircreation582SL red"
    12422 Starting everything now ...
    12484 Run: "C:\spad\spad.exe"
    12484 Run: "c:\trackir5\trackir5.exe"
    13593 Advanced Weather Interface Enabled
   248593 Sim stopped: average frame rate for last 237 secs = 59.5 fps
   253047 J:\FSX Steam\steamapps\common\FSX\SimObjects\Airplanes\PMDG 737-800NGX\B737-800.air
   253922 Aircraft="PMDG 737-800NGX PMDG House"
  2321703 Sim stopped: average frame rate for last 2068 secs = 24.1 fps
  2337906 System time = 21/09/2015 10:19:35, Simulator time = 09:47:21 (16:47Z)
  2337906 *** FSUIPC log file being closed
Minimum frame rate was 17.1 fps, Maximum was 59.9 fps
Minimum available memory recorded was 2113Mb
Average frame rate for running time of 2305 secs = 27.7 fps
Memory managed: 1116 Allocs, 1116 Freed
********* FSUIPC Log file closed ***********
Software installed
Fsx Steam edition v10.0.62615.0 (DX10 Steve's scenery fixer)
Prepar3d v 2.5.12946.0
FSUIPC v4.9.4.5 (registered copy)
PMDG 737 V1.10.6461 777 V1.10.6492 for FSX-SE and P3d
FTX Global installed
active sky next weather via networked PC
CPU: i7 4790k @ 4.5ghz GPU: GTX980 16gb ram 2400ghz
Hyperthreading ON
Kevin H

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I think I have found the cause of the autosaves not deleting in FSX-SE

When I installed the PMDG aircraft I think the installer created a flight sim folder called

Flight Simulator X - Steam Edition Files in c:\users\........\documents

If you have a standalone install of FSX steam edition it uses the standard FSX folder

Flight Simulator X Files. when I looked back at the FSUIPC log I posted it shows

15 System time = 21/09/2015 09:40:38

15 FLT UNC path = "\\HOMESIMPC\Documents\Flight Simulator X - Steam Edition Files\"

as my FSX SE is standalone I deleted the folder Flight Simulator X - Steam Edition Files

after moving the tutorial flight files to the folder - Flight Simulator X Files

Ran FSX after disabling the additional AlsoManage entries I added to the FSUIPC.ini file

and the autosaves update correctly with the delete/overwrites working perfectly

here is the latest FSUIPC log entry

0 System time = 22/09/2015 21:28:54

0 FLT UNC path = "\\HOMESIMPC\Documents\Flight Simulator X

I don't know how I missed this previously - I guess I was fixated on the problem rather than the cause ..... lol



Edited by Yakpilot
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I have just tried as recommended here, I started with the file and process exclusions. Now I only have a small stutter during save phases!


I then did the FSX file deletion and now my files are being deleted after the set amount and now I have just done the PMDG and that works fine. I just need to work out what file and extensions I need to do for the Aerosoft a320 and I should be sorted! I hope :)


Thank you to you all for working on this and if anyone knows the extensions I need to add for the Bus then please could yo let me know :)


Cheers Rob

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  • 8 years later...
  • John Dowson changed the title to Problems with Autosave on Windows 10/11 : The Answers!

Further details from @Ray Proudfoot:

Settings required to minimise / eliminate the delay when Autosave is enabled for the PMDG aircraft in Prepar3D all versions.

  • In Windows 11 select Start - Settings. On the left menu select Privacy and security.
  • At the top of the list select Windows Security.
  • Select Virus and threat protection.
  • Under Virus and threat protection settings select Manage settings.
  • Scroll down to Exclusions. Select Add or remove exclusions
  • Click "+ Add an exclusion"

Add the following choosing File from the drop-down.

  • Prepar3d.exe

Add the following choosing Folder from the drop-down

  • The folder containing FSUIPC6.dll
  • The following folder. Your initial path may differ. C:\P3Dv5\PMDG\PMDG737NGXu\PanelState
  • C:\Users\[username]\Documents\Prepar3D v5 Files

Add the following choosing File Type from the drop-down.

  • FXML
  • PLN
  • WX

After adding those and with Autosave enabled I looked very closely for the autosave action. I barely noticed the save routine and there was no noticeable pause or stutter in P3D. My thanks to @Yakpilot for his post giving this extra info.

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