[Windows 7] Windows Update Agent does not scan correctly

Hi All,

After manual installation of update Office 2010 SP2 (KB2687455) ... WUA does not report (KB2687455)as Installed: https://support.microsoft.com/en-us/kb/2687455

KB2687455 update is reported as:

• Update ID: 9c5e43a3-3ae9-434d-b105-a9d7902d5f9f
• Update Title: Service Pack 2 for Microsoft Office 2010 (KB2687455) 32-Bit Edition
• MSI Product: {90140000-0015-0409-0000-0000000FF1CE}
• MSI Patch: {D6A2CD7F-C90C-4B90-BBA7-2BADE2E08610}

After investigation I found out that Windows Update Agent (verbose logging) is reporting this update as not installed: 

EEHndlr   MSI PatchInfo for product {90140000-0015-0409-0000-0000000FF1CE} and patch {D6A2CD7F-C90C-4B90-BBA7-2BADE2E08610} returned 0x8007066f with state ''
EEHndlr   MSI PatchInfo for product {90140000-0015-0409-0000-0000000FF1CE} and patch {D6A2CD7F-C90C-4B90-BBA7-2BADE2E08610} returned 'Unknown Patch'
Perf, PatchStateForProduct, time, 4, patch, primary, {D6A2CD7F-C90C-4B90-BBA7-2BADE2E08610}, product, {90140000-0015-0409-0000-0000000FF1CE}, context, 112456208

Agent Update {9C5E43A3-3AE9-434D-B105-A9D7902D5F9F} is deployed for scan, and is installable. It will be reported asinstallable.

Update KB2687455 is shown in Programs and Features/Installed Updates as installed on this computer.

Question:

1. This update is MSP (not standard update) so it cannot be queried by win32_quickfixengineering WMI class. How to query all installed updates on system (registry, API, ...)?
2. How WUA query ALL installed updates?
3. How to fix this issue?

Thank you in advance.

Regards,