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Problems with Autosave on Windows 10/11 : The Answers!
Topic starter
[N.B. This was originally posted in the old support forums by user Yakpilot (Kevin H.)]
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
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
FSX.exe
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
FSX.exe
Prepar3d.exe
In folders I added;
c:/drive …. documents/folder names (where saved flight files are kept) for both sims main install folder for each sim
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;
FLT
FSSAVE
WX
FLT.fmc
FLT.sav
FXML
FXML.fmc
FXML.sav
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;
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.
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.
Prepar3d
[AutoSave] 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
FSX-SE
[AutoSave] 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
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.
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.
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 setting up the vids.
I paused the sim while setting up the folders etc
before loading the 737. No simconnect disconnect, no errors
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 ********
Regards
Kevin H
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.
This topic was modified 17 hours ago 2 times by FSUIPC Support
Posted : October 27, 2025 12:32 pm
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