Polemaster camera not recognized on Windows 11 despite working on Windows 7

QHYCCD PoleMaster
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Peter Ledlie avatar
Peter Ledlie avatar

I have a Polemaster camera that I bought around 5 years ago. I used it with my old Laptop (Windows 7), and SharpCap. It worked great and still does with that laptop. I recently purchased a new laptop (Window 11 home), installed the driver/App package from the website, and the program will not recognize the camera. I have tried uninstalling, and reinstalling, to no avail. I turned off the power saving USB function, tried swapping USB cables etc. I can see it in Device Manager as Astroimaging equipment so the computer knows it’s there. I could use it with the Windows 7 machine, but it is soooo slow. :-)

Appreciate any suggestions,

Peter Ledlie

Well written
Paul Larkin avatar
Paul Larkin avatar

Hi, Peter.

I have no ‘fixes’ for you, just to say that mine works fine on my Mele 4C running Windows 11 and polar aligning with SharpCap. So your setup should be OK, notwithstanding something has clearly gone awry.

No doubt someone will have a fix for you soon.

Cheers.

Paul

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noon avatar
noon avatar

Yeah, so this is an issue with Win11.
You can try to download an updated driver but there is also this:

Settings > Privacy & Security > Device Security > Core Isolation > Memory Integrity —> OFF

Realize this bypasses some windows security settings and decreases the protections it has to offer.

Microsoft documents that Memory integrity can prevent older/incompatible kernel-mode drivers from loading (“A driver can’t load on this device”), and that turning off Memory integrity is one workaround (with security warnings).


If you do this and all of a sudden the Polemaster works, you can make the decision whether you want the core isolation protections or if you want to use Polemaster. QHY has pretty much acknowledged as much:

On QHY’s official Download page, under PoleMaster Support → PoleMaster for WINDOWS → System Driver, QHY includes the note:

  • “Solved the problem of unsuccessful driver installation due to memory integrity settings under Win11 system”

    Personally I have not found it solved… but I haven’t tried that new driver yet… I have had to turn off Memory Integrity to use it consistently, but I also haven’t checked lately to see if there is an update I can try. Works perfectly fine with Memory Integrity off.

Well written Helpful Insightful
noon avatar
noon avatar

Here is the new driver version mentioned above. I’m trying it now… I’ll let you know how it goes. If you don’t like clicking on links, I get it… it is also here: https://www.qhyccd.com/download/

Go to Polemaster Support on the left
To the far right of System Driver you should see “Latest Version”
That’s the one you want.

When you Extract All from the downloaded .zip file run this one:
QHYCamerasDriver-V25.04.10.1516-For-Windows10-NewIO

I turned Memory Isolation back on except that I have to reboot my computer for it to take effect and I’m in the middle of shooting, so it will have to wait till the AM.

Recommend just trying the new driver before you mess with Memory Isolation… and apologies for making you follow me through that whole journey.

Helpful Supportive
Alejandro Moreschi avatar
Alejandro Moreschi avatar

noon · Jan 27, 2026, 05:53 AM

Yeah, so this is an issue with Win11.
You can try to download an updated driver but there is also this:

Settings > Privacy & Security > Device Security > Core Isolation > Memory Integrity —> OFF

I did that to solve the same problem with the QHY5ii-m and it worked on my notebook and mini pc.

noon avatar
noon avatar

Update
I rebooted my computer this morning after I turned on Memory Integrity and installed the “Latest Version” driver (that I mentioned above)…

and the Polemaster works once again!
Peter I recommend you try that course of action.

Note: Do not download the AllInOne driver pack… it does not include the Polemaster Driver… You have to download the Polemaster Driver “Latest Version” specifically.

Helpful Supportive
Rich Sky avatar
Rich Sky avatar

📷 IMG_1892.pngIMG_1892.pngsame issue, and you must register manually the associated dll driver. Cheers

Carastro avatar
Carastro avatar
I can't use Polemaster on W11 either.   Luckily I still have old W10 and W7 laptops that I use outdoors for imaging.  But have made a note of the useful info above, but I am no Whizz with IT stuff, so might need some assistance, should I ever need to use my W11 outdoors.

Carole
BlackStarsAstro avatar
BlackStarsAstro avatar

Peter Ledlie · Jan 27, 2026 at 04:52 AM

I have a Polemaster camera that I bought around 5 years ago. I used it with my old Laptop (Windows 7), and SharpCap. It worked great and still does with that laptop. I recently purchased a new laptop (Window 11 home), installed the driver/App package from the website, and the program will not recognize the camera. I have tried uninstalling, and reinstalling, to no avail. I turned off the power saving USB function, tried swapping USB cables etc. I can see it in Device Manager as Astroimaging equipment so the computer knows it’s there. I could use it with the Windows 7 machine, but it is soooo slow. :-)

Appreciate any suggestions,

Peter Ledlie

I have the same issue with win11. Just disconnect imaging & guide cameras and it will work. You are already at the scope so this not really inconvenient.

Peter Ledlie avatar
Peter Ledlie avatar

Thank you to everyone for all those good suggestions! It turns out that I was at fault after all. I had failed to extract one of the downloaded ZIP files, even though I thought I had! Once I did that, it started working just fine. (bone head mistake) I renewed my SharpCap subscription, and now all is well. :-) I wanted to have this as a back up Polar Alignment solution for the field, in case something happens to my StarAid guider.

Peter

Well written Respectful Concise Supportive
Jeff Bennett avatar
Jeff Bennett avatar

Here’s a suggestion from GROK. Have had the sky to test it yet:

Polemaster issues and fixes from GROK

QHY Polemaster software will not run on my Win11 PC. The programs reports several DLLs are missing. What can I do to fix it?

Thought for 19s

The most common cause for missing DLL errors with QHY PoleMaster on Windows 11 is incomplete dependencies (especially Visual C++ runtimes) or an outdated/broken installation. PoleMaster uses a Qt-based version, which often requires specific Microsoft Visual C++ Redistributables.

Step 1: Download and Install the Latest Official PoleMaster Software + Drivers

QHY has updated versions that better address Win11 issues.

  1. Go to the official QHY download page: https://www.qhyccd.com/download/

  2. Under PoleMaster Support > PoleMaster for WINDOWS:

    • Download the latest System Driver (the one noting Win11 memory integrity fix).

    • Download the Stable Software (PoleMaster_QtforWindows_V25.03.07.14.zip or newer).

  1. Uninstall any existing PoleMaster software/drivers first (via Settings > Apps).

  2. Extract and install the new driver first, then the software. Run installers as Administrator.

  3. Reboot your PC after installation.

Step 2: Install Microsoft Visual C++ Redistributables (Fixes Most DLL Errors like MSVCP140.dll, VCRUNTIME140.dll, etc.)

This is the #1 fix for runtime DLL issues.

  • Download and install both x86 and x64 versions of the latest Visual C++ Redistributable from Microsoft:
    Latest Supported Visual C++ Downloads
    (Install the 2015-2022 or newer "vc_redist" packages.)

  • Restart your PC, then try launching PoleMaster.

Step 3: Address Windows 11-Specific Driver Issues (Core Isolation / Memory Integrity)

Many users report PoleMaster driver problems on Win11 that can indirectly cause loading/DLL issues.

  1. Search Windows for "Core Isolation" → Open Core Isolation settings.

  2. Turn off Memory Integrity (this is the common fix; you can re-enable it later if desired).

  3. Restart your PC.

Step 4: Additional Troubleshooting

  • Run as Administrator: Right-click the PoleMaster executable → Run as administrator.

  • Repair system files (helps with corrupted DLLs):
    Open Command Prompt as Administrator and run:


    DISM /Online /Cleanup-Image /RestoreHealth

  • sfc /scannow

    Restart after.

  • Check specific DLLs: If the error names exact files (e.g., tbb.dll), they should be in the PoleMaster install folder. Reinstalling the software usually restores them.

  • Clean reinstall: Delete the PoleMaster folder (usually in Program Files), remove leftover files in %AppData% or %ProgramData%, then reinstall fresh.

If It Still Fails

  • Note the exact DLL names in the error (e.g., msvcp140.dll, tbb.dll) and reply with them for more targeted help.

  • Contact QHY support with your error screenshot and Win11 version details.

  • As a last resort, some users run it successfully after a clean Windows install or on a dedicated astro PC, but the above resolves it for most.

This should get it running—start with the official latest download + VC++ redistributables. Let me know the exact error message if issues persist!

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