Thank you very much for your replies!
You are absolutely correct, needed to wait for sometime before upgrading.
Lion's Mouth! I like that.
I usually keep my computer switched on for the whole day, between 8-7 and do not wish to use start button on the tower to switch it off and restart it, so thought the 'suspend' and ''hibernate' would be fine and consume less electricity!
Tried the 13.04 on the virtualbox! The global menu on the toolbar of the desktop has gone! Freezes when it asks for the password while starting it. And my computer is new, had it 3 months ago.
The Linux Mint 14 is fine, been using it for sometime.