I've just clicked on a page and this thing came up.
Save your money. These wonder programs seldom to anything positive, except for the vendor (he makes money out of it).
What are you wanting an optimizer to do? Do you think your XP setup needs optimizing? In what way?
Often a question to here can come up with plenty of answers for free if there really is anything wrong.
Note: even if the Optimizer thingy appears to be free, that is unlikely to be the case. The initial whatever it does may be free but to do any "optimizing" will almost certainly not be. And will you want what it has done anyway?
N.B. I'm on a different machine to my usual one today. My usual one is set up so as not to receive pop up advertisements. You might like to consider setting yours the same way so you don't receive this nuisance adverts.
The main reason is because things take sooo long to load on my computer. I don't mean programs that require a lot of graphics power for example, but simple things like opening the start menu (by the way, i've been into the registry and adjusted the menu time).
Also, I have about 18 processes ruinning at startup, but when I go to services in the administration tools, and even msconfig, I can see that I've taken off as much as I can for the system to run stabily (if thats a word :S)
What I do on booting up (always early in the morning) is switch on and then do my ablutions (clean teeth, wash etc.) come back and log on. then I go and make a cup of tea. By the time I get back, everything is souped up and ready to go. That way I don't get irritated by the time XP loading takes and I know that by doing the loading up at its own pace, everything should be operating correctly.