A Torx bolt is something new to me but if you do a lot of work on
electronic equipment you are sure to run into some, and you are going to
need a sepcial Torx socket to remove it properly.
You can buy a single Torx socket, but the more economical choice would
be to buy a Torx socket set. That way you will be able to use them on
all of your gear.
You can find these tool sets in most electronics stores and most
hardware stores. You can find the widest selection and best prices on
the internet. Your best bet is to buy them before you need them. If
you buy a set with a wide ranges of sizes you should be all set when the
time comes.