My CPU usage soars over 100% frequently on the task manager. I get occasional warnings that my system is low on virtual memory. My memory usage is only about 50% on the task manager. My cursor frequently locks or disappears. Is there anything I can do myself to improve my system performance? I regularly perform system maintenance such as defrag, hard drive scanning, and have anti virus, anti spyware and firewall protection. I use Windows 2000 Professional, have 512k of memory, and my hard drive is only 1/3 full. Thanks for any help.