Recently I installed Vmware Server. When I opened the web browser it popped up with an error service unavailable 503. To fix follow the steps below.\nFirst find your tomcat directory. In my instance the directory was C:Program Files (x86)VMwareVMware Servertomcat\nOpen the /bin folder\n\nNow you need to right click on tomcat6.exe and go to properties. Click on the compatibility tab\n\nClick on the button that says change settings for all users.\nYou will now see a new window with a single tab labeled compatibility for all users\nCheck the box that says "Run this program in compatibility mode for:"\n\nThat is it now you can start your Vmware service and open your browser.\n