Invalid signature detected. Secure boot policy in setup. (After bios update)

[joe7dust]

I decided to update the BIOS since I was having usb issues, and afterwards I cannot boot windows. It says: "Invalid signature detected. Secure boot policy in setup."

I tried turning off secure boot and clearing keys but it just bluescreens (stop 0000007b) during start even after hitting f8. It also sometimes has blank screen after bootgui.

I will probably end up having to reinstall Windows but I don't have the disc right now.

[DavidSMP · Accepted solution]

Hi @joe7dust,

Good Day. A warm welcome to the HP community. I reviewed the case regarding issues with booting after a bios update. It also gives blue screen errors. I will be delighted to assist you here.

Superb description, brilliant troubleshooting and terrific observations made before posting. Kudos to you for that. 🙂

For better clarity and to assist you correctly, I would require more information regarding this:

• Did you run diagnostics to check if the computer’s hardware is fully functional?
• Did you try to roll back the bios?

For now, try these steps:

• Please try to restore the bios by following the instructions from this link: http://hp.care/2yPPwZM
• It is a keyboard combination. 
• Also, follow the steps from this link:  http://hp.care/2rZhONT to restore the bios. This is for notebooks. but the steps are valid for a desktop as well.
• If the first method does not work, then try the second method by downloading the bios to a USB flash drive from a different computer and try to restore the bios following these instructions.
• Here if the USB ports are working correctly then the USB flash drive with the bios image will be detected to be updated or restored.
• Then to eliminate hardware component failures run the hardware diagnostics from this link: http://hp.care/2ymOyW8 and follow all the steps under the option " Run the Extensive Test (2 hours or more) " 
• If any component fails, make a note of the failure code.
• This is because initially, the USB ports were not working. So running the diagnostics will give us a correct picture. (run component tests and run diagnostics on the USB ports)
• If diagnostics fail you may need to contact a local technician like Best Buy or Staples or any local technician to get the computer repaired.

If the computer is more than 3 years old then service options with HP are no longer available because the original suppliers and manufacturers who manufacture and supply the parts to HP to build and service the computer don't do so anymore.

Please contact a local technician to get the printer repaired.

• If diagnostics pass then disable secure boot again and try to reinstall windows from the recovery media or from windows bootable discs.
• Then follow the instructions from this link: http://hp.care/2ylhzkR to run system recovery. Follow the option for Windows 7.
• For further assistance try check these links:
• Link 1: http://hp.care/2ylhAFr is a Microsoft community link.

This should do the trick for you.

Please perform all these steps patiently as it is critical to resolving the issue. The trick is to remain patient, Going by your technical expertise and competence I am sure you will be able to perform these steps without breaking a sweat. 🙂

Hope this helps. Let me know how it goes.

To simply say thanks, please click the "Thumbs Up" button to give me a Kudos to appreciate my efforts to help.

If this helps, please mark this as “Accepted Solution” as it will help several others with the same issue to get it resolved without hassles.

Take care now and have a splendid week ahead. 🙂

[joe7dust]

I was able to get it going again by disabling secure boot and switching to IDE. Supposedly AHCI is better but I am getting better speeds on all drives now too.

About the USB I stopped using the two upper ones in the back as well as the front ones, luckily the four lower ones in the back work great.

[DavidSMP]

Hi @joe7dust,

I reviewed the post comprehensively. Thanks for the super quick reply. You've done amazingly well here. You've displayed great credentials with your profound technical expertise, commendable patience and immaculate attitude to make it work again. Kudos to you for a job well done. 🙂 

Secure boot has to be disabled for Windows 7 to install correctly and enabled to install Windows 10. I am glad that it panned out well. Also, glad to know that some of the important USB ports are working fine. 

It has been a fabulous experience to have worked with you and an absolute privilege to share this platform with you given your profound technical competence, Trust me I've done all I can to assist you by keeping your best interest in mind and disabling secure boot did the trick also. I genuinely hope the product works great and stays healthy for a long time.

If this helps, to simply say thanks, please click the "Thumbs Up" button to give me a Kudos to appreciate my efforts to help.Also, please mark this as “Accepted Solution” as it will help several others with the same issue to get it resolved without hassles.

Take care and have a blessed year ahead and stay healthy. 🙂

Cheers!

[joe7dust]

David, have you considered using less copy/paste to make yourself look reputable? Your replies are kind of ridiculous sounding.

[DavidSMP]

Hi @joe7dust,

I read the post and the feedback is taken. It just happens that I have an immaculate command over the English language and great diction. I am not patting myself on the back. I was privileged enough to be taught English in an elite school by an Englishman. I  try to resolve a customer's query earnestly and with dedication. At the end of the day if a customer's issue is fixed I go home happy knowing well that justice has been done.

Besides I think a lot of customers out there are tech savvy and hence when they follow troubleshooting steps it needs to be appreciated. As Dale Carnegie once said: "Be hearty in your approbation and lavish in your praise" when a good job is done. I think several of them do a great job. 

I accept criticism and praise with the same levels of equanimity. I am really happy for you that the issue has been taken care of and I think you've done a great job. 

Thanks for your feedback and do have a great year ahead. 🙂