How to get around Press CTRL + Alt + Delete or use the Windows Security Button Windows 7

I have just had a client call me and has the following message on his windows 7 pro login.

Press CTRL + Alt + Delete or use the Windows Security Button

We cannot bypass it as after pressing control alt delete it just flashes and goes back to the same prompt

It is a MSI AE2400 All in one pc

Its been fine for years but just this morning it presented this behaviour and no one did anything

I do have boot disk that allows me to get to the registry but after spending some time with google nothing works

Is there some instructions to be able to disable via registry or some other method as I am unable to log in at all

Have tried safemode same issue, have tried last know good configuration with no luck

Any thoughts appreciated
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To get around the requirement to press those keys, offline deactivate that policy, so lookup the corresponding registry keys.
cdsausAuthor Commented:
Not sure which policy to look for
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Therefore MS offers a GPO reference excel sheet. Google it, download it, inside the file search for ctrl
Ok, have it open here:
"Do not display the lock screen" found at computer config -  Control Panel\Personalization
cdsausAuthor Commented:
Problem is can't login to get there. I haven't tried to rdp in yet as I am not sure if that is even turned on to allow access via rdp
You wrote that you are able to "get to the registry", that's why I wrote, change the regkeys offline.
The regkeys is
Set it to 1

To access the registry offline, do like this:
-boot from a win7/8/10 (or 2008/2012) setup DVD. Don't select install but open computer repair options -by pressing F10 and start regedit (by firing the command regedit).
- In regedit select the hive HKLM (Hive Key Local Machine), then, from the file menu, choose "load hive". Now browse to c:\windows\system32\config (which is on your "old" installation) and select the file named "software". Mount it using the name offline. You will see it as a branch "offline" below HKLM now.
-Below "offline", visit Software\Policies\Microsoft\Windows\Personalization and change NoLockScreen  to 1.
-now unmount "offline" by selecting it and choosing "unload hive".
Done. Quit the setup by simply resetting your computer and it will not show the lockscreen.

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cdsausAuthor Commented:
I'll give it a go and report back thanks for the advice
I've requested that this question be deleted for the following reason:

Not enough information to confirm an answer.
cdsausAuthor Commented:
Apologies for delay in getting back to this. I was able to log in via remote from advice provided from McKnife and the links he provided. I was able to get into the registry and turn the lock screen off. Next time a rebooted the the login screen was back to normal, So Problem was solved

Thanks for all advice
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Windows 7

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