That is surprising that you are having so many issues.
I run Vista Ultimate 64 with 4gigs of ram and have SP1 installed with
all updates and is running perfect with no problems.
Are you sure you have tried to update all drivers other than windows
update? Also make sure Service pack 1 is installed.
If you have tried all of that you could try trouble shooting and may
find it's an easy fix OR you can try and reinstall Vista and try again.
That really sucks when people have issues
Also you really have not provided that much detail as to when or why it
locks up? Does it lock up on the desktop not doing anything or when you
run a program? What program or all of them?
--
Adamd
Vista * > *OSX