Share via

New PC has PxHlpa64.sys driver incompatible with Win11 Memory Integrity feature

Anonymous
2022-12-12T23:22:38+00:00

Hello,

I bought a new PC, it's only a few days old, I'm still exploring things including how Win11 does things.

I tried to turn on Memory Integrity but it says an incompatible driver prevents it from activating:

PxHlpa64.sys

Corel Corporation

All I can find online is that this driver is associated with a DVD drive which my All-In-One PC from Hewlett-Packard does not have. A Microsoft page recommends that I simply do not remove the driver just to get Memory Integrity to work, so here I am posting here to see if anyone can help me.

I have not transferred any files from my old computer yet. Here are the programs that I have added to this new PC:

Adobe Acrobat 2020

Adobe Photoshop Elements 15

Adobe Premier Elements 15

Epson Customer Participation

Epson Event Manager

Epson FAX Utility

Epson PC-FAX Driver

Epson Scan

EpsonNet Print

Google Earth Pro

Malwarebytes

Mozilla Firefox

NordVPN

NordVPN network TAP

Skype

Software Updater (Epson)

Spybot - Search & destroy

VLC Media Player

XnView

I did install and uninstall the Jacquie Lawson Advent Calendar (jacquielawson.com) after I found its window size was puny and would not enlarge. The Uninstall Wizard indicated it would remove this program and all related files. I trust that this is true such that the driver in question was not part of that software.

I have uninstalled some programs of what they call bloatware. TikTok and the like.

I do not know what this Corel driver does and how and when it got onto this new computer.

Can anyone confirm if that driver is only for a DVD drive (which this new All-In-One PC does not have) and how I might proceed in order to successfully turn on Memory Integrity? It seems odd that Microsoft would include it on this new PC if it was incompatible with Memory Integrity.

Thank you for any advice.

Windows for home | Windows 11 | Devices and drivers

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

Answer accepted by question author

Ramesh 176.2K Reputation points Volunteer Moderator
2022-12-15T05:47:16+00:00

That error occurs if you run the command from an unelevated Command Prompt.

To open an elevated Command Prompt. click Start, type cmd.exe. When the search results are shown, right-click the cmd.exe entry and choose Run as administrator.

And, regarding the driver backup, you can copy the two REG files and the C:\Windows\System32\Drivers\PxHlpa64.sys file (which has been renamed to PxHlpa64.sys.old) to your USB drive. Nothing else needs to be done in this case.

Was this answer helpful?

6 people found this answer helpful.
0 comments

Answer accepted by question author

Ramesh 176.2K Reputation points Volunteer Moderator
2022-12-15T06:41:18+00:00

Jay,

Nice work. The driver file won't load as it has been renamed, and the respective entry has been deleted from the registry. This also means Adobe Premiere Elements 15's (or any other software that uses the driver) DVD-burning feature will be inoperable.

To re-import the driver, Memory Integrity should be disabled, and the system has to be restarted. After a restart, run the two REG files (C:\PxHlpa64_filter.reg and C:\PxHlpa64.reg) by double-clicking and clicking Yes when asked for confirmation. Then rename the driver file to its old name (remove the .old suffix). Restart again, and the driver should load.

Regarding the Windows 11 version number: I don't know why it's that way. But look at the previous OSes and their version numbers.

  • 95-ME = v4
  • 2K-XP = v5
  • Vista, 7, 8, and 8.1 = v6
  • 10-11 = v10

Here's a convo on reddit Why did Microsoft decide to call Windows 11's build number, build 10. highernumber still?

Windows 11 starts from OS Build 10.22000.

Windows 10 starts from OS Build 10.0.10240.

Was this answer helpful?

3 people found this answer helpful.
0 comments

27 additional answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Ramesh 176.2K Reputation points Volunteer Moderator
    2022-12-14T09:19:10+00:00

    Jay,

    1. From an Admin Command Prompt, run:
    • reg export "HKLM\SYSTEM\CurrentControlSet\Services\PxHlpa64" C:\PxHlpa64.reg
    • reg export "HKLM\SYSTEM\CurrentControlSet\Control\Class{4d36e965-e325-11ce-bfc1-08002be10318}" C:\PxHlpa64_filter.reg

    You should see the message "The operation completed successfully."

    1. Then, run these two commands:
    • sc.exe delete PxHlpa64
    • ren C:\WINDOWS\system32\drivers\PxHlpa64.sys PxHlpa64.sys.old
    1. Run the following REG file to remove the "PxHlpa64" LowerFilters entry: https://www.winhelponline.com/blog/wp-content/uploads/2025/04/pxhlpa64_uninstall.zip

    Restart Windows. See if you can enable Memory Integrity.

    Reference:

    What is PxHlpa64.sys and How to Uninstall it:

    https://www.winhelponline.com/blog/pxhlpa64-sys-uninstall-driver/

    Was this answer helpful?

    10 people found this answer helpful.
    0 comments
  2. Anonymous
    2022-12-13T06:48:38+00:00

    Hi Ramesh,

    While those other conversations have satisfied themselves that this driver is associated with a DVD drive, in the circumstances of their discussions none of them needed themselves to say what I need to hear. While they associate the driver with a DVD drive, they never say that this driver is exclusive to a DVD drive. That difference in language is critical here, methinks, in light of Microsoft's recommendation that users should not simply delete that driver in order to get the Memory Integrity feature to work.

    Are you able to state factually, sir, that this driver is only associated with a disk-burning program? Because, if it is associated with other uses that my computer may have, I would not want to delete it without further confidence.

    Thank you.

    Was this answer helpful?

    5 people found this answer helpful.
    0 comments
  3. Ramesh 176.2K Reputation points Volunteer Moderator
    2022-12-13T08:28:04+00:00

    Hi,

    I believe Adobe Premiere Elements uses the module to power its "Burn to DVD" feature. Adobe may have bundled the Corel module (previously Roxio/Sonic) PxHlpa64.sys with A.P.Elements 15.

    Having said that, you can backup the PxHlpa64.sys driver/service and delete it. Restart Windows, and see if other aspects of Adobe Premiere Elements function correctly.

    From an admin Command Prompt, run:

    • wmic sysdriver where "PathName like '%PxHlpa64%'" get Name, PathName, State

    Pls post the output here. Once we get the service name, we can back it up and then delete the service.

    Was this answer helpful?

    3 people found this answer helpful.
    0 comments