Can't change Windows Update setting

I just did a clean installation of Windows 7 Home Premium 32-bit on my Fujitsu Lifebook U820. I am signed on with an account that has administrative permissions, but when I go to Windows Update and try to change the settings, the dialog tells me "Some settings are managed by your system administrator." As such it will not let me change how important updates are done and is stuck on "Never Check for updates (not recommended)". I am the only user of this laptop, at my home and it is not part of a network. Could I have selected an incorrect option during my Win 7 installation? How do I change this as I want Windows 7 to update automatically? I've spent hours trying to solve this.

Thanks for the suggestion, but I already tried that and it did not work. Even the "hidden" Admin account could not change the Windows Update settings.

Try these tools:

1.Reset WU modules Repair & Fix Windows Updates with Fix WU Utility | The Windows Club

2.Reset Security settings by using "MS Fix it" How do I restore security settings to the default settings?

3.Use another tool for reset security settings Rizone Security Restore 0.2.2.228 | Rizone Technologies +restart

@Flavius

Thanks for the suggestions but none of these worked (I did not try the MS Fix It as it does not work with Win7).

Besides it would be caused also by any 3p security software.If reset security settings manually will not solve problem then I strong recommend uninstall all 3p security software.

@ccatlett1984 - I tried running the command for Vista "secedit /configure /cfg %windir%\inf\defltbase.inf /db defltbase.sdb /verbose". It ran successfully, but did not change anything. The existing Win7 user accounts were still there and I still cannot change the Windows Update settings. How would my laptop have become part of a domain? It is used stand-alone and at home. Are there any questions I could have answered during the Win7 installation that affected this? Even so, I should still be able to change Update settings.

As I said in my previos post - uninstall all 3p security software:firewall,antivirus,antimalware.Maybe do you have NIS?

@Flavius - I'm running Microsoft Security Essentials (no other firewall, antivirus, etc.)