So when I use the Control Panel 2.5, it refuses to start or stop Apache and Mysql.
When I try to stop Mysql, it'll say "ERROR: MySql service not stopped [-1]". And when I try to stop Apache, it simply says "-1".
When I try to start to either of the two, it'll say a similar error, namely "ERROR: Apache/MySql service not started [-1]".
They start and perfectly fine when I use the Control Panel V3 though, with a slightly annoying UAC pop-up.
I use XAMPP 1.7.7 on Windows 7 64-bit. It's installed on D://xampp, which is a secondary drive, so it shouldn't have write permission problems.