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When I tried to install and reboot to Ubuntu 12.04, I got an error as 'prefix not set' and if I choose the option normal mode it is showing me another error.

Please help me with this. I have tried to install both 32-bit and 64-bit also, but the result is same.

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How you installing Ubuntu? – Mitch Jul 26 '12 at 15:22
And what is the error message? Post the complete message. – netcoder Jul 26 '12 at 15:25
flagged as a possible duplicate? – fossfreedom Jul 26 '12 at 20:05

Verify that you have downloaded the correct ISO CD by using their MD5/SHA1 checksums. I know this is quite obvious, but is the source of trouble in most cases.

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