I have a Compaq Presario F500 laptop, which comes with a built-in Broadcom wireless network adapter. Vista Home Premium came pre-installed, but the system only has 1Gb of RAM, which is the it's maximum.
Vista is so power-hungry that things were never going to go well. The straw which broke the camel's back came one Sunday afternoon when I was surfing the web while listening to music on WMP. I navigated to a site with an embedded flash video and the system froze, completely. I rebooted and tried again but got the same problem, the system was totally maxing out. It's worth mentioning that I already had Aero and all the fancy, (read sparkly; pointless), effects turned off. I came to the conclusion that Vista had to go.