As XP runs it may decide to degrade the DMA level. Looking won't tell you but a simple flip as noted at http://winhlp.com/?q=node/10 will remove this from your list.
Quick Specs: Windows XP, 1GB Ram, 3.00GHz dual processors.
So a fairly decent computer, and it runs most applications/games on decent graphics. At the start it was perfect, but recently my computer *beeps* constantly when running high CPU usage programs (eg. Anti-spyware, or numerous programs similaneously). When looking at Task Manager it appears to beep as soon as my CPU Usage hits 50%+. I realise that computers get clogged with programs and slow in time, but I just want the beeping to stop. Happy to reply, if addition is required to solve the problem. Thanks.