This operating system is absolutely fantastic, if you know how to tame it. by which i mean, firstly running on a more up to date computer, and setting it to the way you like it. One feature of Vista which i found to be honest, a pain in the backside is UAC (User Account Control) which prompts the user everytime you try to run an app, for e.g. disk defragmenter, Disk Cleanup, or download a file, copy a file, or even delete one. This is a good idea in theory, becasue it means that if malicious software attempts to run something or change something on your computer, you would have to confirm this, but can get pretty annoying.
I genuinely dont understand where people are having problems, unless simply, you don't know what you are on about, OR your computer isn't fast enough to run it.