How to Check Windows XP Memory Usage

1. Boot up your computer and log in to Windows XP.
2. Press and hold “Ctrl-Shift-Esc” on your keyboard. When the Task Manager pops up on your screen, release the keys.
3. 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.