Computer:   Dell Dimension 3000, Pentium 4 CPU, 3.00Ghz, 1GB of RAM
OS: Windows XP Home Edition ver 2002, Server Pack 2
Hard Drive:  Seagate Barracuda ST380011
Sound Card:  Sound Audigy2 Platinum-ex

Problem: 
The Audigy sound card seems to be working (in other words, it plays audio files fed to it), but Soundfont Bank Manager, Creative Media Source and the other software utilities stopped working.  When I try to open Soundfont Bank Manager, for example, I get the Windows error message:
"SFBM MFC Application has encountered a problem and needs to close.  We are sorry for the inconvenience." The message also provides a button I can click on to "Send Error Report to Microsoft". 

Since I write and record music, those utilities are very much needed.

Course of action I've taken so far:
--  I have tried un-installing all Soundblaster software using [Control Panel - Add or Remove Programs].  Unfortunately, I get an error message:  "An installation support file could not be installed.  The system cannot find the file specified." 
-- I have tried re-installing all Soundblaster software, and on other occasions the drivers only, from the original CD, but the install fails every time at the point it's 95% installed and "updating Windows drivers". It just sits on that screen, never completing the job. 
-- I have tried installing updated drivers I downloaded from Creative's website.  The same thing happens... the computer hangs and the drivers never get installed.
-- For what it's worth, the computer came with a SoundMax soundcard integrated into the motherboard.  After disabling and un-installing it, I tried the above steps again with the same results.

Can someone offer any words of wisdom to solve this problem?  Thanks in advance for any help.