A driver was not digitally signed after software and driver installation on Windows 7

C:\windows\system32\dipxapi.dll
error, deivice status not working properly for my H Officejet Pro 8500 a909a printer . In Device Manager I noticed a driver was not digitally signed which i beleive is causing my Internet Explorer to not work properly.
Is this a driver I need to correct or get signed? How do I correct this problem?
Need Advise
Carla

Thank you for the reply, and potential fixes. I have combed the MS site already. The workarounds may provide some return functionality, but this type issue between two companies as HP and MS seems peculiar, and I am holding out for a permanent bonafide solution.
For example, the "F8 override disabling all digital signatures" plus installing yet another program to continue with every reboot is just not a viable solution to me.

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A driver was not digitally signed after software and driver installation on Windows 7

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