Windows XP uses less memory than some alternative operating systems, but even this operating system has its limits. If you’re using Windows XP across your small business’ network, even the modest drain of bookkeeping, Internet applications and word processing can add up as you add files or install new programs. Before installing new software or setting up another employee with access to the Windows XP system, you can check the current memory usage. The Task Manager gives you real-time memory stats for individual processes and the computer as a whole, giving a clearer picture of your memory usage.
Boot up your computer and log in to Windows XP.
Press and hold “Ctrl-Shift-Esc” on your keyboard. When the Task Manager pops up on your screen, release the keys.
Click on the “Processes" tab to see a list of your computer’s current processes, along with a column that shows the memory usage of each individual process. There's also a Commit Charge field, followed by two numbers, indicating the total memory allocated to software across the entire computer. The first number is how much memory is being used, and the last number is the total memory for your system.