Comment 36 for bug 245794

Hi Guys.

I had the same problem as you. In my case the installer stoped at about 30% with the same messagebox.
Firstly, I should check if RAM is OK but I missed that because the messagebox informed me that the problem is Input/Output error, so I thought that the problem is connected with Hard Drive or CD/DVD drive. By the way I checked if CD is burnt correctly by using LiveCD check integrity.
I burnt a lot of copies of Ubuntu 9.10/9.04 and I even use a copy brought by Canonical. Mostly I had an error with 1 file. I connected other CD drive and checked integrity and there were no errors, I thought that is a good path to solve the problem, but it wouldn't. I switched Hard Drive and with the "new" CD drive I started installing Ubuntu. The result was the same, Input/Output error. After that I read dci-Japan's post and I tried this solution.
I've got 2 RAM modules (2x2GB). I turn on memtest and what I saw was good path to solve the problem, one of modules was faulty (because memtest showed that) but which one I had to find out by checking each one separately. In fact, one was faulty but the other was OK. I remove the faulty one and there were no installing errors. So, dci-Japan thank you a lot ;);)

Oh ... I almost forget, someone told that removing RAM modules didn't help. I am not sure if this simple method is useful for anyone but you can try check memory by this test included in LiveCD and make sure if RAM is ok or not.

Thanks one more time :)