will win vista 64 bit run all 32 bit software? win xp x64 had problem with norton internet security, and mcafee internet security, even with real player.

I tried to install real player on win xp x64, there was error message says 'real player cannot be installed on this version of windows'. same with norton and mcafee. norton and mcafee had message on their site posted they will version out by 2nd half of 2006 to support 64 bit.

i even found small 32 bit software such as video vault had problem runnning in win xp x64.

will win vista x64 have the same problem?