No sound on Dell after OS reinstall

[schoolboy]

Greetings to all from a newbie.

OK then, I realise this thread looks familiar, but I can't find a precise match for my issue. If it turns out that I am a time-waster then I apologise in advance.

My neighbour's Dell Dimension 8200 was infested with spyware and the browser was hijacked. After failing to get it clean I reinstalled XP (SP1) and all is well except for no sound. Searching the net got me a driver package labelled R45973 that installs Soundmax for the Analog Devices AD1885 Multimedia Audio Controller, which runs almost to completion but then gives the message 'driver not found - reboot and run this program again.' Needless to say, I have been round that loop umpteen times!

So what am I missing? Dell support is not a lot of good because the PC was supplied with ME as the OS. Any sound advice?

Note to moderators: How come Scotland is not on the list of countries on the sign-up form? I had to select England!

Schoolboy