I installed ZA Free by habit onto my Vista laptop (Toshiba 215A series. Frequent calls to HP over possible software problems with my all in one C 6180 printer when trying to print from this laptop. HP said it was not a driver issue. Probably a firewall issue. Read a post on this forum about someone who was encountering the same issue with a similar printer. Something to do with True Vector. Sure enough, finally held my breath and uninstalled ZA and voila, I printed without a problem. Just writing to save some folks a lot of frustration. ZA Free does appear to conflict with printing to an HP C6180 with Vista 32 bit. At least, it was the direct source of my problem.