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- Unable to install device driver for HP ENVY 7855 on Vista - ...

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02-27-2022 08:45 AM
Product: HP ENVY Photo 7855 All-in-One Printer
Operating System: Microsoft Windows Vista
Downloaded latest HP ENVY 7800-series Print and Scan device driver and accessories (full pack) and tried to install on Vista. It failed during step 1 (device driver install) saying that cabinet file E7800x86.cab has an invalid signature. So I tried the basic package (device driver only) and it failed the same way.
The whole package came down as "unsigned".
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