With Windows ME I’d check how many applications you have running, it has a well known resources problem in that as you run it it caches every program and file you run till it’s got no resources or memory left. Try cutting down some of these applications running on startup and you might notice an improvement.

Start-Run, type msconfig, OK or Enter, click on the Startup tab and see if you can disable any of the items running there. You will then need to restart your computer if you do make any changes.