Big problem: local security authority (LSA) protection is off (after the last Windows Update)

Hi Dave, thanks a lot for your solution.

It worked partially.

Microsoft Defender is showing again the green tick and Device security again is showing the green tick.

When I access the Device security section... it recognizes again the TPM.

However, this section is not properly fixed, I mean exactly the "Secure boot" feature.

PROBLEMS I AM STILL EXPERIENCING

A) I mean... when I access the Device security... sometimes Secure boot is detected and sometimes it is not detected. This solution do not fix the "Secure boot detection"

I am 100% sure the Secure Boot is activated in my BIOS, because I have upgraded from Windows 10 to Windows 11 and it was detected the TPM and the Secure Boot, so I am 100% confident this is not a configuration problem in my BIOS.

The "erratic behaviour" (sometimes detecting the Secure Boot and sometimes not detecting it, started after the update which caused all these problems)

B) Additionally, I am getting some alerts in Microsoft Defender (protection history section - protected folder access blocked)

Sometimes, Microsoft Defender is alerting me that it would not allow the access to certain folders to some legitimate software I have installed in my computer, so I am forced to grant access creating a rule or filter. This never happened before, this is happening after the problems experienced with this update.

I HAVE SOME QUESTIONS

I would appreciate your help, because I am confused with this problem.

1) Could you tell me what update is causing this LSA problem?

2) Is Microsoft aware of this problem and working on a solution for it?

3) Would I continue receiving updates via Windows Update (even if Secure Boot is not detected? or after this problem my computer will be isolated and not able to receive automatic updates?

4) How may I avoid the alerts protected folder access blocked?

5) After some hours of use, I am realizing that SOME TIMES, when I double click on Microsoft Defender, the Security at a glance window shows all the options greyed, like if they were not available, however, actually you can click on them and access to them also. When I close the Microsoft Defender Window and open it again... it show again the green ticks... so the behaviour seems to be erratic. At this point I am wondering if I am still protected or if should I to install an independent antivirus until Microsoft solve this problem?

I would appreciate your reply.

Thanks a lot for your help.

Hi Dave,

I do not have a Windows 11 ISO, I just upgraded from Windows 10. As regards to the greyed options, I can assure you more people are having the same problems, because I have seen the screenshots published in the Microsoft forum (for Spain) and they look exactly the same as my screenshots.

This happened after the update.

However, it was reported that the KB5007651 is causing these problems.

Please, take a look to these threads and tell me if are you aware of this?

Will I continue receiving updates despite the Secure Bot is not detected?

Is very strange because when the Secure Boot is detected the TPM is not detected and viceversa, but I assure you the people is reporting the same issue after the update. This erratic behavior started after the update.

My Windows 11 is completely legal. It was upgraded from a Windows 10 Home completely legal. However, when I bought the PC in the shop they put a label in the system board box with the Windows 10 key. The thing is I don't know where is my legal key and I don't know if do I need a serial number?

I am asking this because perhaps would I need this info to perform a repair?

How may I retrieve my legal key from my Windows?

As regards to the repair? What should I need to do? Where may I download the Windows 11 Home ISO? and what should I do next, run it and repair Windows 11?

Is there any guide?

Are you sure I won't lose my programs and data?

When an independent advisor advises people to do something without giving any reason then warning bells sound in my head.

I will make the assumption that a dark minded entity has infiltrated Microsoft and has prepared the way for a catastrophic event.

Man, i have the same **** problem from few days. Is the same for me. I have TPM 2.0 acitvated in bios but the Device security is off and saying that "there is no TPM available. Can't do anything and my PC is at risk.

Great job. Thank you so much, DaveM121!