Highlighted
Chrisadell
Silver

After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

Hello

I really need help.

Yesterday evening windows retarted my laptop, telling me it found a new update. I vened had no choice, it just restarted.

Last windows version was fall creator update. Now i don't know the one it just installed.

Since nothing happened except the littles dots moving sometimes, I let it work over night, thinking that in the morning it would have installed the update.

But this morning I found only a black screen, and after reboot this red message.

It seems it is not finding the disk boot sector.

Any Idea? Panik...

0 Kudos
20 Replies
Chrisadell
Silver

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

I disabled secure boot option,

But no boot device found.

Is there a way to uninstall the last windows update, without being able to boot the computer? 

0 Kudos
Chrisadell
Silver

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

Hi again

I am talking to myself...

I did some progress.

I made a bootable USB drive from a link Microsoft support provided me.

go.microsoft.com/.../

The download took some hours.

Now, I found a kind of guide on how to proceed:

To get to Windows Startup Settings in the Windows Recovery Environment. You may follow the steps provided below and check if it helps to resolve the issue.

If you don't have a disk or USB, download the ISO from a working computer and try creating a bootable disk or USB.

If you can't start your PC, follow these instructions to get to the Windows Recovery Environment.

Start your computer from the installation media, Insert the DVD or USB flash drive and restart your computer.

If you see a message asking you to “Press any key to boot from DVD,” do so. If you don’t see the message, you might need to change the boot order in your computer's BIOS settings so that it first starts from the DVD or USB.

When you see the Install Windows page, tap or click Repair your computer to start the Windows Recovery Environment.

In the Windows Recovery Environment, on the Choose an option screen, tap or click Troubleshoot.

Tap or click, advanced options and then click on Startup repair.

After this complete the repair and see if you are able to boot in to your computer.

 

So far so good, but I wanted to know, anyone of you already did that with a DELL? And it worked? I don't want to lose 500 Gigas of datas. It's a bit scarry.

 

Looking forward to hear from you.

Thanks

0 Kudos
Saltgrass
Diamond

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

I am sure someone would like to help but your situation is a little different from the normal won't boot situations.  I don't understand the Invalid signatures but there was a thread a couple of weeks ago about the same type message.

Is the drive showing in the Bios?   If it is an older system, perhaps the drive had a problem.

----------------------------------------------------------------------------------


XPS 2720, Inspiron 17 7779, Inspiron 15 7567, XPS 13 9365, Inspiron 1545, TB16 Dock

Chrisadell
Silver

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

Hi

Thanks for your answer.

Yes the drive is showing in the BIOS. No hard drive issue in diagnostic either.

I tried to establish correct BIOS settings, incase the windows update changed something. I reset keys.

Now i hope that, when I try to repair windows from the boot USB, that the windows key is always there, since it was not given with the computer. I did some search, windows key is injected in the BIOS. Now, after all I did in order to find a working reboot mode, I hope I did not delete it (OMG).

The other thing I am afraid of for the windows repair. I had to chose a language when i downloaded the windows 10 install file, otherwise it wouldn't match with the windows version i have installed.

I bought this DELL with windows in english, but it came in spanish (!). I had two spanish version to chose from, spanish from spain, and spanish from Mexico.

Well, I opted for Mexico, since I bought this laptop in the US. Hope this is the correct one. Or it will ask for the product key, which I don't have.

Please wish me luck...

0 Kudos
Chrisadell
Silver

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

I contacted microsoft support again.

Unfortunately the agent did not know a lot on this issue.

I could boot on the flash drive, but all basic options failed.

No restore point restauration

No repair of start options

No reverse to previous windows version

Only available option is cmd, but who has an idea of the appropriated commands? *cry*

I really need my installation back running.

Thanks

0 Kudos
Chrisadell
Silver

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

Should I reload all Bios Default setting (F9)

0 Kudos
ieee488
Diamond

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

One of the messages did tell you to re-seat the hard drive.

0 Kudos
Chrisadell
Silver

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

Hi ieee488

Thanks for your answer.

Sorry for the dumb question, but what means "reseat"?

My hard drive is recognized in BIOS.

0 Kudos
Chrisadell
Silver

RE: After Windows Update (automatic) Red Message "Invalid Signature detected. Check Policy in Setup"

Maybe the boot media is not working because of wrong language settings?

Is there a way to know the language of my windows version with the service tag?

I ordered english, was delivered to Miami, and received spanish. but what kind of spanish is it? Mexican or Spain? Or does this make no difference?

Thans

0 Kudos