Problem with Ubuntu 12.10

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http://askubuntu.com – I am new in Ubuntu 12.10. I download Ubuntu 12.10 32-bit and make a boot-able disk by following the instruction. In installation process, I choose "ext4 extending ... " when appear "something else" and other option. Is that wrong ?? After installation, my computer is going to very much slow and always appear to hang. Please help me. (HowTos)