Make sure that the pre-installed OS (Windows XP w/ Service Pack 2) was correctly modified to fully support your dual core CPU. I say this because I have done scouting around retail stores (BestBuy, Fry’s, CircuitCity, etc) with notebooks and desktops…. turns out that 100% of all of the dual core systems that I looked at was NOT properly modified to fully support the dual cores within. Tsk Tsk.
The performance of your multitasking and games (ex. BF2, Oblivion, etc) would be a lil F’ed Up if the dual cores are not both being utilized because the setting for your Windows isnt set correctly. This hotfix is for those that want the most out of their Dual Cores. If you are just a casual PC user, this hotfix might not do anything for you. But if you multitask and game, you definitely see an increase in performance. As well as if you do Professional Audio editing and Video editing, this will also help you greatly.