WAMP and IIS could be conflicting on ports even if you have the IIS disabled. Not saying that is the case, but possible.
Though something else that could be the cause is that your system basically has some issues.
Check the event viewer for errors, you don't want any errors especially if this is a reasonably new installation.
From DOS Command Prompt run this (assuming you only have a C: drive)
CHKDSK C: /F
When it prompts to run after a reboot say yes and reboot the computer.
Then look in your Event Viewer under Applications and look for WinLogon and it should have a report of anything it found wrong on the drive.
Then check and delete all your temporary files on the system.
C:\WINDOWS\TEMP (delete everything in here)
Del all the files in here as well
C:\Documents and Settings\your logon id\Local Settings\Temp
Then reboot your computer one more time and start the PHPBuilder FAQ from the start.
Don't forget setting up a system variable for PHP (a must, it's in the FAQ)
Make sure that IIS_WPG and IUSR_COMPUTERNAME has rights for reading in PHP/MySQL/ and C:\WINDOWS\TEMP folders. Will probably also need to allow Modify for one of them in the %temp% folder.
That should get it going for you. If not let me know.
