netstat -aon | find ":80"
netstat -aon | find ":443"

The first command checks for programs using port 80.
The second command checks for programs using port 443. As shown below there is a program using port 443 and its PID is 4852.
external image 000008s.png

To find out what program belongs to that PID
  1. Open task manager
  2. Click the Processes Tab
  3. Click View and select Select Columns.
external image 000009.png

4. Turn on the PID column.
external image 000010.png
5. Sort the columns by PID in task manger (by clicking on the column title)
6. Locate the PID in question to find out what it is. Once you know that stopping it will not harm the server, then simply right click and "End Process Tree".