The vast majority of Windows drivers are installed from the installation disc or from Windwos update. Some drivers are not available from Windows update and have to be downloaded from their 3rd party manufacturer's website. It would help if you could tell us what specific item(s) you're needing drivers for.
Something you could try is changing the default settings for Windows update
Start -> type in "change", select "Change Device Installation Settings" -> Select any setting except for "Never install driver software from Windows Update" -> Save