As the printer will use a Parallel port, it's not plug and play, you will need to find drivers yourself - So before you try it, search the make and model on Google and see what comes up - I suspect it probably won't work, but you never know.
Plus, has your machine got a parallel port on it ?
Dot Matrix??? Oh my GOD!! I remember them noisy little feckers. But as above, You'd need a parallel Port (most likley) and drivers could be an issue, unless you can run it in old emulation mode, which i doubt
well im not sure on vista to be honest, i have a epson lq 550 dot matrix on xp, for that i found a driver, so as stated already look see if you can find a driver. i have a 24 pin 24 pin is a better move. and you wont need the ribbon either.. i make good stencils out of it when nessecery..what dm do you have exactly? my dughter has vista, i will have a look for you if i can.. you have the lead, i had to get the same..have you tried plugging in and finding a driver?