what an idiot i am. have a secured wifi network, but have had a range extender for a year or so, with constant problems. the last time, probably 3 weeks ago, i had to reset it, i didnt click on the password box (it defaults to no password). didnt think anything of it. which is pretty stupid especially as i live above a cafe. my internet has been slower last few days, my ISP throttles when you drop down ratings due to higher use. it say I've used 75 gigs in 3 weeks. to be honest i might have used 30 gigs of that maximum. don't think I've got much on my computer that they could have accessed and got benefit from, but is there any way to check what sort of info was going through the router? could my ISP tell me? even knowing if it was downloading or uploading would i guess tell me a lot.