have a prob with my laptop maybe someone could shed some light on ?????

Trying to get a cable working for my diagnostics on my bmw and after loading the cable driver I need to go into device manager and change settings in com/lpt ports but cant or lappy wont show that tab for some reason ???? after plugging cable in as instructed. picks up my external mouse straight away so I don't know whether it a prob with pc or cable ?? have tried it on another borrowed lappy and the tab seems to be there

Any ideas guys ????