Read this if you have a pen tablet

I submitted a thread a few weeks ago about problems I was having getting tools to work in photoshop. The software was installing and opening fine, but then some tools just did not work, plain and simple. I finally got tech support at Adobe to help me and they determined that this happens when you have a pen tablet (especially the Wacom Graphire, which I use). The tablet overrides your mouse sometimes, making it useless. Can't believe the problem was so simple. Solution: unplug the tablet and reboot.Only plug it in when using it.