I have just installed Ubuntu 14.04 for the first time. There is also working Windows 7 on that PC.
After the installation from Ubuntu 14.04 with an USB-Stick I clicked on "restart" and the system told me to unplug the USB-Stick. Ok done. But then the system started with Windows 7 and I had no choice nor chance to change the OS I wanted to start.
So my PC has no UEFI just an old BIOS and in the Ubuntu Wiki I can't find a way to change the Windows bootloader. So what can I do to start Ubuntu??? :-(