Is Apache and MySQL started using the new Control Panel xampp-control-3-beta.exe found in the xampp folder, make sure you have exited the older 2.5 version first.
Did you try http://127.0.0.1
Does your Windows HOST file have this line as the first line after the commented sections
- Code: Select all
If not then add it using notepad by right clicking and selecting run as Administrator, if you have trouble saving the file after editing.
Are there any clues in the \xampp\apache\logs\error.log file?