My younger brother inherited a used computer from a friend,here's how it arrived. Case:Antek solution series super mini tower case MOBO:Biostar mainboard,M7VKQ.PRO,ver:6.2/SiS 740/962L,Socket A Video,S/W audio,ATA-133,USB 2.0,Micro ATX (no idea what all this means just found it on the box) PSU:Beauty 550w dual fan high quality Part #S550A-BK Graphics:Nvidia e-GeForce FX-5200 pci 128mb ddr,I dont have a DVI adapter and the one that came with the card is missing,so I temporarily installed a ATI Radeon 9600SE AGP8X card so I can use my moniter to configure the system. OS:Windows XP professional it also has a standard disk drive with a DVD writer and CD-ROM drive I'm not sure of the hard drive or the processor all i know is it's AMD athalon XP and seems to load well,I was told this computer was built by an enthusiast for decent gaming but once I started windows I was greeted with "rundll 32 is missing" and another dll was also missing I can't remember. I connected my cable modem and nothing happened,the modem is plug and play with XP and the software is automatic from the internet.But it wont respond,the computer knows its being plugged and unplugged but no matter what I do it will not connect. The computer came with XP pro but the install cd is missing,I have a spare XP home disc I never used but when I go to install it on the new computer is says "Windows XP pro doesn't support upgrading from XP pro to XP home. How should I go about installing XP home?I cant use the existing XP pro without any install disk in case I need to reformat and I think once I install home the missing dll's will return and the modem will plug and play but the computer doesn't agree with changing the OS. Sorry for such a lenghty post just want to make sure to give as much system info as possible for now,Thank you all so much.