– Windows did not find a Microsoft signature associated with the software package you want to install. – Cannot run (execute) an unsigned software (program).

– Cannot load or install an unsigned driver. – Windows requires digitally signed driver OR Digitally signed driver is required. – Windows cannot verify the digital signature for this file. Problems-Symptoms that are solved with this guide:

But this becomes a problem in the case that you own an old unsigned legitimate software or driver and you want to install or load it to your computer, because the OS doesn't allow it to work or load.

But in real life, publishers and vendors cannot always pay Microsoft to verify all their products or Microsoft cannot verify all the drivers or programs that are published every day. This means that all drivers and programs must be digitally signed (verified) in order to be installed and run on latest Windows Operating Systems.ĭigital Signatures ensure that the software publisher or hardware vendor is trusted and verified by Microsoft. Driver Signing is a method to verify the identity of the software publisher or the hardware (driver) vendor in order to protect your system from been infected with malware rootkits, that are able to run on the lowest level of Operating System. In Windows 8 (& 8.1), 7 & Vista Operating Systems, you cannot load a driver or execute a program that hasn’t a Driver Signature.

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