Java Xampp错误：Apache因端口80而关闭？

我在电脑上安装了xampp，出现以下错误：

Error: Apache shutdown unexpectedly.
23:00:50  [Apache]  This may be due to a blocked port, missing dependencies, 
23:00:50  [Apache]  improper privileges, a crash, or a shutdown by another method.
23:00:50  [Apache]  Press the Logs button to view error logs and check
23:00:50  [Apache]  the Windows Event Viewer for more clues
23:00:50  [Apache]  If you need more help, copy and post this
23:00:50  [Apache]  entire log window on the forums

我没有打开skype，如果我更改apache的端口，仍然会出现此错误

谁能帮帮我吗！谢谢