WIN 2000 INSTALLATION

FOR PAST ONE WEEK, I TRIED TO INSTALL WIN 2000 PROFESSIONAL ON MY COMPUTER. THE COMPUTER WAS BOUGHT IN 1997. THE PROCESSOR IS 200 MHZ. FIRST I WAS ABLE TO INSTALL WIN 2000 BUT WHEN IT CAME TO MODEM, THE OS GOT CORRUPTED EVERY TIME AND I DID RE-INSTALLATION. THIS WENT ON SEVERAL TIMES. I EVEN BOUGHT A NEW MODEM WHICH HAS A LUCENT CHIPSET AND ACTIONTEC BOARD. I DO NOT KNOW IS MODEM THE REAL CULPRIT. WIN 2000 COULD NOT EVEN LOCATE DRIVER FOR IT. I HAVE 200 MHZ PENTIUM, 2 GB HD, 64 MB RAM.
WHAT ELSE COULD BE WRONG.

-ZAHID