I don't know what the heck COM3 isbut it keeps saying that that is the port it is supposed to be in
Use the TI USB Silver cable or a standard USB to Mini USB. The calculator shipped with one or both cables.
Before it can be recognized you must install the drivers. Download TI connect and install it on the computer before connecting the calculator. If you use the Graph link (black cable) you need to have a serial port on the computer.
COM3 is serial communication port. On newer computers (laptops) that port is no longer available.
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