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#11
I've made some progress with this error which i should have posted here. I managed to resolve the error 0x0000007a problem by rolling back my laptop using windows system restore. This completely sorted the problem out.
However, i have now discovered the source of the problem as it's now come back. The problem happens when i plug the printer in to my laptop via USB connection. I can only conclude that it is down to HP's USB drivers for windows 7.
Anyone know of how to sort this without having to rollback or re-install windows??