Hmmm.. a little messing around with the Command Prompt could solve this Start the Command Prompt and then type netstat -ano | find "LISTENING" | find ":80" You'll see a bunch of stuff like "TCP x.x.x.x:80 x.x.x.x:0 LISTENING ", what we're interested in here is , if there are more than one (which normally shouldn't happen), repeat the steps below for each one Type tasklist /SVC /FI "PID eq ", replace with the one you saw after executing the first command. You'll see 3 lines of stuff, but we're only interested in the last line, which should be something like " ", if is N/A and is not Apache.exe, then post the output of this command here (if is Skype.exe, then just search the forum for how to change the port it listens on); if is not N/A then proceed to the next step Type net stop , replace with the one displayed after executing the command above (it shouldn't have any spaces) You should see something like "The xxxx service was stopped successfully", this means that you've got rid of the service (probably IIS) that was using port 80 (and thus making you unable to access Uniform Server); if any output other than that was received, post it here Hope that helps