Getting Errors after my last update?

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http://askubuntu.com – After last update (12.04) I can hardly use by PC. Lots of Apport msgs, sending information take time. Older plugins working don't do that anymore (Flash Player f. ex., but seems impossible to correct). I am a novice with Linux, part of the problem I guess, but after this update it seems I have to leave Linux (used it for 1 year and have been quite satisfied until this last update, sorry. Is there anyway to remove last update and get my PC working ok again? (HowTos)