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I installed ubuntu 12.04 lts on my old cpu and it just dosen't run right (lags, and other bugs)So I'm wondering if installing an old version of ubuntu on a cpu with a newer version is possible?

Like ubuntu 12.04 to 10.04. I already have the .iso file of 10.04 and I'm about to burn it into an installer dvd.

Again, I'm wondering if installing an old version over a new one is possible as I would want to replace 12.04 with 10.04

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marked as duplicate by user68186, RolandiXor Jun 11 '13 at 20:26

This question was marked as an exact duplicate of an existing question.

If you want to overwrite your actual Ubuntu version with another one then "yes" you can. Otherwise if you want to downgrade, I would say that if possible, it could be a little bit hard. Please edit your question to include your CPU's specs. – edwin Jun 11 '13 at 16:16
I would suggest using Lubuntu if your CPU is that old. Not that it helps, of course, but you might want to consider it. – Thomas Ward Jun 11 '13 at 16:27

I Dont Think you Can.

If you just want to Have it downgraded with your documents just make a backup and then Install the Older One (Format The Existing Ubuntu Partition Or Just Press Erase and Reinstall Ubuntu(Version)

Here is a quick Guide on how to backup your files

Enjoy and If i answered Your Question Press Answered :P

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You can, similar questions: see How to roll back Ubuntu to a previous version?. If you don't want to redownload, you can mention your CD as source in Ubuntu repositories. In Synaptic: settings|repositories|other sources, in Ubuntu software center: Edit|software sources|other software.

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