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i accidentally installed Ubuntu 12.04 64 bit on my 32 bit Pc and already installed a lot of important things. How can I change it to 32 bit OS without loosing data or settings?

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if it works, then you have a 64-bit compatible pc. What kind of CPU do you have? that's what matters. – Alvar May 4 '13 at 21:57
One oword: backup!!!! – user68186 May 4 '13 at 22:10
As @akvar noted: Why do even need/want 32-bit? Are you limited to <1GB RAM? You do know 64-bit OS still runs 32-bit software. – david6 May 4 '13 at 23:42
As @d4av1dsix says everything will still work. – Alvar May 5 '13 at 0:30
Duplicate of:… – david6 Jun 7 '13 at 22:36

You can not run 64 bit os on a 32 bit processor, so if you are successfully running it, then your cpu must be 64 bit

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