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I have a weird problem - on my Lenovo Z570 I cannot change the default boot order.

I am trying to load a bootable DVD and I have two hard drives. The boot sequence has the DVD drive as last, but when I bring it on the top, hit F10 and reboot, the changes seem to be neglected, as the PC boots from the hard drive anyway. When I open the BIOS after I'd changed it, it's back at the defaults.

I can boot from the DVD using F12 and choosing the appropriate boot medium, but that won't allow me to finish installation from the DVD as I need the DVD to boot again after restart.

What could be causing this?

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are you saving the changes you made to BIOS boot order, many times exiting the BIOS directly after making changes to settings, Resets the factory default. – Ankit Mishra Sep 10 '12 at 12:30

Two possible answers.
1. The settings are not being saved on save and exit selection. Try to save, navigate to some other options and then save and exit. I ran into this bug with an Lenovo R500.

  1. The CMOS battery may be going or completely shot. For a $2 part, it can sometimes be aggravating to troubleshoot.
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I don't think it is the battery, since my system clock is just fine. I will measure it though, just in case. – Martin Melka Sep 10 '12 at 12:58

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