Can you revert back to Lion after installing Mountain Lion?

Since I have bought ML basically all my software (Saf,Mail,iTunes etc..) is not operating correctly. Safari drops out if I stop using after about 15min and the only way to get it working again is to do a hard (forced) re-start and this is constantly happening. Also when opening some applications the icon's just constantly bounce and do not open. Is there a way to re-install Lion and get my money back as I have had enough of not being able to use my 2010 iMac as it was designed to be.

Unless you have a backup made right before installing ML, it's not an easy task. You would have to erase the hard drive, reinstall the previous system, reinstall all your apps and then import data from somewhere. And some data formats have changed - Mail, for example, has had slight changes to its mailboxes in both the last two major system upgrades. The only way to import messages that aren't still stored on the server into an older version of Mail is one at a time.
Since your problems are not normal, I would recommend troubleshooting instead. Start with Understanding upgrade nightmares.

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