What you should do after you system is being flagged as 'Not genuine' after you installed the KB971033 update.

Using the (Lenovo) Blacklisted Windows 7 Ultimate Product Key?

• Open a Command prompt with 'Administrator' privileges
• Type slmgr.vbs -dlv
• Make sure the value of the line 'Partial Product Key' is NOT 'PMJBM'.
• If this value is 'PMJBM' then you have the (Lenovo) Blacklisted Ultimate Product Key installed, eg: '22TKD-F8XX6-YG69F-9M66D-PMJBM'
• Open a Command prompt with 'Administrator' privileges
• Type slmgr.vbs -upk to uninstall the Blacklisted Product Key
• Pick another Windows 7 Ultimate Product Key from our Windows 7 OEM SLP Key Collection
• Open a Command prompt with 'Administrator' privileges
• Type slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX to install the new Product Key (Replacing the X's with the value of the Windows 7 Ultimate Product Key chosen in previous step)
• Reboot
• Validate online. (Important)

Note:
It is adviced to use only one 'Activation' technique, we have noticed/heard there are individuals who install multiple 'Activation' hacks thinking they are protected better.
This is not the case and most likely only give you problems and is not advised!