I spent the better part of 5 hours wrestling with Windows Vista, finally beating it into submission to allow Uniform Server to run.       I am using Uniform Server 3.5   My issue was that Start_Server would appear to be successful, mounting the W:\ drive and launching the redirect.html page. However, by the time it redirected, the W:\ drive would have unmounted and left me scratching my head.   I followed the suggestions on the problems wiki page to try:  netstat -ano | find "LISTENING" | find "80" my result?  
 TCP	0.0.0.0:80			 0.0.0.0:0			  LISTENING	   4
 TCP	[::]:80				[::]:0				 LISTENING	   4
     I tried the running process lookup suggested for XP, but Vista did not like the filter used:  tasklist /SVC /fi "PID 4"
ERROR: The search filter cannot be recognized.   Altering this, I used:   tasklist /SVC to get:  
Image Name					 PID Services
========================= ======== ============================================
System Idle Process			  0 N/A
System						   4 N/A
smss.exe					   484 N/A
csrss.exe					  616 N/A
wininit.exe					668 N/A
csrss.exe					  688 N/A
services.exe				   724 N/A
lsass.exe					  740 KeyIso, SamSs
lsm.exe						748 N/A
winlogon.exe				   836 N/A
...etc.
   So, this PID of 4 is a System process. It is some sort of System process locking port 80. I turned off IIS completely, so that was not it. Google searches suggested Skype, but I do not have Skype installed.   The culprit? A Windows service called "World Wide Web Publishing Service"   Go to control panel, open up the System and Maintenance item, then Administrative Tools, then Services. I clicked through a number that looked like they may be web related, and tested the netstat command after each one. Sure enough, after turning this service off, I was able to rock 'n roll. I flipped it on / off a few times to be sure, and it does seem to be my own little culprit.   EDIT: Also, turning off MS-SQL's Reporting Services is necessary as well, as I learned after a reboot.     Just thought I would leave this info for anyone else noticing that they can't get Apache to listen on 0.0.0.0:80 due to a System PID claiming it.