Hard disk is low on space dialog box randomly appears.
Windows 2000 is prompting you to run Disk Cleanup, which will remove unnecessary files from the hard disk. Click 'Disk Cleanup', and then select the check boxes next to the files you want to delete. Click 'OK', and then click 'Yes'. Click 'Disk Cleanup'. If the error message is no longer displayed, you can start Disk Cleanup by clicking 'Start' on the taskbar, pointing in turn to 'Programs', 'Accessories', and 'System Tools', and then clicking 'Disk Cleanup'.