I used secunia psi and it downloaded adobe flash player for my win7 x64 install. On above, and related to it as well..... Unless you specifically run the x64 version of Internet Explorer (there is a separate shortcut/exe) in x64 Vista/7, you are running a 32 bit version of Internet Explorer... The two x64 oses are still not configured to run the x64 iexplore.exe by default.. I imagine this is because of the lack of 64 bit plugins (such as Adobe Flash Player) for it.. So, the more correct saying would be "there's no Adobe Flash player for a 64-bit browser yet". Once a 64 bit plugin is available, I suspect you will be able to isntall both the 32 bit and 64 bit plugin (one for each version of the browser). I really have seen very little difference in browser speed from 32 bit to 64 bit version (of a given app)..