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I am using Ubuntu 11.04 and want to upgrade to latest version 12.10. but I cannot get either software center manager or synaptic to open, I just get error messages. I have downloaded ISO of 11.10 for an incremental install, mounted it but it will not run. get an error message stating cannot find autorun file . how to upgrade incrementally? can I fix software center?

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closed as off topic by fossfreedom Feb 2 '13 at 10:14

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Have you tried upgrading incrementally through the Upgrade Manger? If you open the Upgrade manger, it would show you that "A new version of Ubuntu is available - 11.10" –  Pawan Nov 6 '12 at 6:59
How did you 'mount' 11.10 .iso file? You might be better to do a fresh install of Ubuntu 12.04 LTS, after first backing up your data and settings. What are you attempting to maintain, through this complex upgrade? –  david6 Nov 6 '12 at 8:08
I may be missing something, but AFAIK, "autorun" files are a Windows thing. Linux uses a boot manager to load a system image - even from a live CD. I suspect either the disc you burned does not have what you think it does on it or your computer is trying to boot from another device. Run a checksum on your iso and check your computer's booting order in the machine settings that come up when you first turn your computer on and quickly press whatever key activates it. if you need more details on either of these, ask. Did you burn the cd as an image or as files? Only an image will boot. –  Joe Nov 7 '12 at 19:51

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