Genuine Windows 7 product key no longer validated + C0000022 error

I hope to get help here as the answer seem impossible to find elsewhere on the net!

I have (or had...) a validated and genuin OEM Windows 7 product key and everything has worked fine for several years.
The product has been validated and Windows Update has worked fine.

But now the Windows 7 is no longer validated!
"Status is not available"
"Product ID: Not available"

A Windows 7 validating on Microsoft sais that there are files missing or are corrupt.
So how do I fix this?
I have the product key, I just need to know where to activate it again and how!

Also the Windows Update has stopped working with error C0000022 so I guess these two things are connected somehow?

Will my system recovery CD (not system restore) help or will that just wipe the whole computer out?
(I don't want to do a complete reinstallation of Windows 7)

Tried another system restore point but that didn't help either.

Very greatful for help in how to solve this! Thank you!

Thank you!

However, I have unfortunately already tried that example out.
I don't have the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_SPLDR key in my registry at all, so I'm stuck there as well.

My system is in Swedish but I did the cmd commands suggested in the post, and it all sais that "Error: The registry key or the value as asked was not found".

With a diagnostic tool I got an error code also (attached file).

Hmmm....?

Ok, done!
(No violations found)

This was a tricky one! Only one language there, unfortunately (?).
And the Windows 7 edition is correct and genuine, it has been all along but stopped so for about a week ago.
(I'm so greatful for you help!)

I fixed it and I'm so happy!



What I did was that I uninstalled firewall (ZoneAlarm) and AVG and then used a system restore point from a month back.
Not only for a few days.

This is what I belive happend ; The security programmes has somehow blocked the system from proper system restores until now, and I could not find out why. Then I did the same procedure in safe mode I was told that Windows Installer was disabled (all of a sudden).
So in Services I reactivated it, then cleaned the registry with Ccleaner and run the system restore point. Now it all run smoothly and is as it should be!

I suspect that a third party programme or Snap.do is the cause to this mess and "hijack", even though the malwareprogrammes did not find anything even in advanced settings and I had to manually delete snapdo-things from the registry.
At least this is the only malware I know of that I've had to deal with lately.

So, it's all good for now. Thank you very much for your help, archer! :)
I'll do my best now to pay back this help by helping others in this forum!