failed services

I have PIII 550 with 1.5g HD (removable).
I get services (server, computer browser) failed to start because of not enough storage space. I get this message whenever I load nic (3com 10/100, 3c905) driver eventhough I have the latest driver. Also,I don’t have any software loaded on this machine except NT. I have sp 6 loaded on here and over 900mb of free space.

what can I do to fix this problem..
Thanks in advance..