Bad upload nood to clean up disk

[JoeDiB]

How do I clean up disk after a bad install?
My upgrade to 11 failed and I have multiple recovery boots. I would like to get back to where I was.

[zvacet]

I don't think you can downgrade system.If you have separate home partition install again 10.04 and upgrade to 12.04 when it is released (and of month I think).