Hi Bardy,
I understand you have an Officejet 8600 that when trying to install is giving you a load library error code 193. I'm sorry to hear this, but I will do my best to help.
In doing some research, I came across this [Solution!] Re: error 193: "failed to add monitor HP Discovery Port Monitor (HP Office jet Pro 8600) thread that was marked as an Accepted Solution, so I'm hoping it can help.
Also if that doesn't work, or doesn't apply to your system, could you tell me which version of Windows you're using as well as how the printer is connected to the computer?
Hope to hear back from you soon!