You didn't answer all my questions. Please number your answers. We need some basic info to help you:
1--You have only XP with NO PROGRAMS and NO DATA?
XP Home or Pro?
2---Make & Model # of comp?
3-- and mobo
4-Current HD size (we need to see if the mobo can take more)
4--How much more space you think you need
6--You have none of the SP's 1,2,3?
6--Did you Run CCleaner? (free download)
6--Did you throw out old data useless data?
9--uninstalled useless programs
One more:#11---Run TFC (Temp File Cleaner-free download)
12--What is the "last thing"you say updates won't do? Install? Or do you mean the last update didn't install?
13--Get back to me after you go through my list, and tell me how much HD space is left now.