-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
- HP Community
- Notebooks
- Notebook Boot and Lockup
- error message at startup......driver not loading......mbamch...

Create an account on the HP Community to personalize your profile and ask a question
10-16-2026 05:45 AM
Hi @KLF11
Welcome to the HP Support Community!
Thanks for reaching out!
I understand your concern when your notebook displays an error at startup related to mbamchameleon.sys and Windows is unable to load the driver properly.Dont worry I'll be glad to help you with this.
To better assist you, could you kindly confirm the below details :
- Which version of Windows are you using (Windows 10 or Windows 11)?
- Are you able to boot into Windows normally, or does the system stop at the error message?
- Could you share a photo of the complete error message displayed on the screen?
I hope this helps.
I'm an HP Employee.
If this reply helped resolve your issue, please select the Accept as Solution as it helps others in the community quickly find the answer they’re looking for.
And if you found this reply helpful, clicking Yes below is a great way to let us know we’re providing the support you need, as it encourages us to keep improving and sharing helpful guidance.