Can't click in windows/panels in Ubuntu Netbook Remix

Hello

I've got two Acer Aspire One A110, and I have installed Ubuntu Netbook Remix on both, in exactly the same way.
My problem is, on one of the One's, I just can't click in windows or panels, but it work fine on my other One.
Googled some, but haven't found someone else have this problem, only some with Compiz in Linux Mint, but I'm not use Compiz.
Even when booting UNR from a Live USB flash disk with a fresh configuration, the error remains.
I've tried to boot in Recovery Mode with no success.

I also want to know how to reinstall the orginal Linpus software that was pre-installed. The recovery DVD isn't working, it just crash HDDs by remove partitions.

I wonder, I saw a AA1 on youtube with UNR with "Show desktop" when click on "Home"/"Super"/"Start" button. Can't see something similar in Keyboardshortcuts in the settings view.

Any help would be great.