PC RUNS SLOW AND LOCKS UP IN INTERNET

I HAVE A PENTIUM 1 233MMX WITH WINDOWS ME,MICROSOFT SAYS IT SHOULD RUN FINE.,IT FREEZES UP ON THE NET AND IT STATES THAT I HAVE LESS MEMORY THAN I SHOULD HAVE IN THE WINDOWS TROUBLESHOOTER.MY HARDDRIVE IS 3.0GIG AND IT SHOWS ABOUT 1.0GIG LESS?