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I'm trying to install Ubuntu 12.10 from a DVD-R disk, and everything is just fine until I get to the first window after clicking Install Ubuntu I checked the box Download updates while installing and also the Install third-party software box.

After clicking next, however, the install just hangs there. I've been waiting for over an hour now and all I see is the mouse cursor showing that it's loading.

What should I do to get past this? Thanks!

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You should probably just hold the power button to turn the machine off, and then retry without checking any boxes. – mikewhatever Nov 24 '12 at 1:40
I tried that, still stuck at the same spot. – jclarke Nov 24 '12 at 2:32
up vote 0 down vote accepted

Check the md5sum of your downloaded iso, (in windows use, get the checksum to compare with from, if the sums are the same burn the iso on another dvd preferably on a regular dvd and try again. If the sums are not the same redownload ubuntu.

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I re-burend the ISO to a DVD+R and it works perfectly. Thanks for the help. – jclarke Nov 27 '12 at 3:16
You're welcome. – jeroen Nov 27 '12 at 20:06

for anyone who is still having this problem, i figured it out.
for some reason the ubuntu LIVE system mounts and uses the swap located on the hard drive in 12.10 :/
here is how to fix it: step 1: open gparted
step 2: locate the partition labeled "swap"
step 3: click "swap off"
step 4: re-try system installation

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