Don't worry, if it's defective, your guarantee covers an entire year (depending on where it was bought... in Europe Bamboos have a two-year-guarantee).
Anyways, the problem could also be a software issue. Sometimes it works to simply unplug and then plug the tablet back in, without the need to restart the whole system. With a more persisting issue present, uninstalling the entire Bamboo software and then installing it again might solve the riddle. Another thing that could affect the situation is your OS - whether it's an old installation, for example. Windows pretty much needs to be reinstalled every year in order to run smoothly and to be fast. So, if you take me, 'cause I'm an excellent example of laziness, my OS is 4 years old and even though I clean up the registry regularly, defrag and delete unnecessary files, booting takes about 3 minutes whereas it used to only take about 20 seconds before. Another nasty side effect is constant errors and problems with various software.
Easiest thing is to first make sure it's a hardware issue before returning the tablet. Perhaps even trying it on a different computer, see if it shows the same problems.
Ok cool I'll have to check the warranty in the U.S but I doubt it will be much different. Yeah sometimes unplugging it works but a lot of time it doesn't. I just got my laptop in July or August so Windows should be ok...I think.And I tried the tablet on my old laptop and I had the same issue with it
Well, if it shows the same problems with two different computers, then that's that. Return it in the store and they'll take care of the rest. U.S. warranty for Bamboos is one year, you can check on their website.