I have two xp machines (work&home) running abyss v2.0 with php 4.x. Work computer is fine, but home computer has started a interesting behavior. PHP runs fine in other programs (ie Dreamweaver) & run scripts fine until recently. It will do

<?php echo "hello world!"; ?>

Now when I try to load a page, Windows tries to load whatever program associated to it. ie. IrfanView is launched when a *.jpg is on the page.
Images are showing up as error 500, but it's shown in the directory listing if I use http://localhost/phenix/images/.
I am baffled by this behavior.
Here is my cgi.log

CGI: ["C:\Program Files\pictures\I_view32.exe" phenix_r1_c1.jpg ]	URI: /phenix/images/phenix_r1_c1.jpg	Broken pipe
CGI: ["C:\Program Files\pictures\I_view32.exe" "Sand Dollar 006.jpg" ]	URI: /phenix/Sand%20Dollar%20006.jpg	Broken pipe
CGI: ["C:\Program Files\pictures\I_view32.exe" "Sand Dollar 004.jpg" ]	URI: /phenix/Sand%20Dollar%20004.jpg	Broken pipe
CGI: [C:\PROGRA~1\MOZILL~1\FIREFOX.EXE -url index.html ]	URI: /index.html	Broken pipe
CGI: ["C:\Program Files\Macromedia\Fireworks MX 2004\Fireworks.exe" pwrabyss.png ]	URI: /pwrabyss.png	Broken pipe
CGI: [CSSfile stylesheet.css ]	URI: /phenix/stylesheet.css	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r1_c1.gif ]	URI: /phenix/images/navbar_r1_c1.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c1.gif ]	URI: /phenix/images/navbar_r3_c1.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c2.gif ]	URI: /phenix/images/navbar_r3_c2.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c3.gif ]	URI: /phenix/images/navbar_r3_c3.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c4.gif ]	URI: /phenix/images/navbar_r3_c4.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c5.gif ]	URI: /phenix/images/navbar_r3_c5.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c6.gif ]	URI: /phenix/images/navbar_r3_c6.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c7.gif ]	URI: /phenix/images/navbar_r3_c7.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c8.gif ]	URI: /phenix/images/navbar_r3_c8.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c9.gif ]	URI: /phenix/images/navbar_r3_c9.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r4_c1.gif ]	URI: /phenix/images/navbar_r4_c1.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c3_f2.gif ]	URI: /phenix/images/navbar_r3_c3_f2.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c3.gif ]	URI: /phenix/images/navbar_r3_c3.gif	Bad executable
CGI: [CSSfile stylesheet.css ]	URI: /phenix/stylesheet.css	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r1_c1.gif ]	URI: /phenix/images/navbar_r1_c1.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c1.gif ]	URI: /phenix/images/navbar_r3_c1.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c2.gif ]	URI: /phenix/images/navbar_r3_c2.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c3.gif ]	URI: /phenix/images/navbar_r3_c3.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c4.gif ]	URI: /phenix/images/navbar_r3_c4.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c5.gif ]	URI: /phenix/images/navbar_r3_c5.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c6.gif ]	URI: /phenix/images/navbar_r3_c6.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c7.gif ]	URI: /phenix/images/navbar_r3_c7.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c8.gif ]	URI: /phenix/images/navbar_r3_c8.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r3_c9.gif ]	URI: /phenix/images/navbar_r3_c9.gif	Bad executable
CGI: [rundll32.exe C:\WINDOWS\system32\SHIMGVW.DLL,ImageView_Fullscreen navbar_r4_c1.gif ]	URI: /phenix/images/navbar_r4_c1.gif	Bad executable
CGI: ["C:\Program Files\pictures\I_view32.exe" phenix_r1_c1.jpg ]	URI: /phenix/images/phenix_r1_c1.jpg	Broken pipe

Here is my access.log

127.0.0.1 - - [13/Apr/2005:18:15:59 -0400] "GET / HTTP/1.1" 200 123
127.0.0.1 - - [13/Apr/2005:18:15:59 -0400] "GET /pwrabyss.png HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:23 -0400] "GET /favicon.ico HTTP/1.1" 404 234
127.0.0.1 - - [13/Apr/2005:18:16:49 -0400] "GET /phenix/index.php HTTP/1.1" 200 10508
127.0.0.1 - - [13/Apr/2005:18:16:49 -0400] "GET /phenix/stylesheet.css HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:49 -0400] "GET /phenix/images/navbar_r1_c1.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:49 -0400] "GET /phenix/images/navbar_r3_c1.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:49 -0400] "GET /phenix/images/navbar_r3_c2.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:50 -0400] "GET /phenix/images/navbar_r3_c3.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:50 -0400] "GET /phenix/images/navbar_r3_c4.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:50 -0400] "GET /phenix/images/navbar_r3_c5.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:50 -0400] "GET /phenix/images/navbar_r3_c6.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:50 -0400] "GET /phenix/images/navbar_r3_c7.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:50 -0400] "GET /phenix/images/navbar_r3_c8.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:50 -0400] "GET /phenix/images/navbar_r3_c9.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:50 -0400] "GET /phenix/images/navbar_r4_c1.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:55 -0400] "GET /phenix/images/navbar_r3_c3_f2.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:55 -0400] "GET /phenix/images/navbar_r3_c3.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:57 -0400] "GET /phenix/index.php HTTP/1.1" 200 10508
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/stylesheet.css HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r1_c1.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c1.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c2.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c3.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c4.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c5.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c6.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c7.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c8.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r3_c9.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:58 -0400] "GET /phenix/images/navbar_r4_c1.gif HTTP/1.1" 500 246
127.0.0.1 - - [13/Apr/2005:18:16:49 -0400] "GET /phenix/images/phenix_r1_c1.jpg HTTP/1.1" 500 0