my (good) pc is on vista 64bit. The only difference between it and 32bit is that it will run faster (providing you have >4gb of ram) when do shit that takes up alot of memory.
windows being slow at booting is cos off all the crap you put on it.
and lol at the admin thing how did you cock that up?
anyway back to the topic: flash 10 is still a bit glitchy and can run slow, but its normally quite fine (you could always downgrade to flash 9)