parts that does not work
 

We are new to Ubuntu have tried it since november 2010.
However, besides suddenly stopped working and having to re-setup certain parts do not work on/off.
Ubuntu software center does not work. Computer shows the page but clicking on any item such as download or documents are failing.
Ubuntu update does not update, it shows the page then it stops working. Games are there but do not react on clicking. Openoffice, can be clicked and that is it, no open office. The list is endless.
Should we go on or simple go back to Microsoft?

Connect to the Internet. Open a Terminal and issue the following commands on-by-one.
Try again...

Run the commands that Arochester posted. If you get errors, then post them here. Also post the contents of your /etc/apt/sources.list file. And post any files you may have in your /etc/apt/sources.d/ directory.
Are you using any third party repositories??? This includes those all to often problematic PPA resitories.
After running the commands that Arochester posted, try running any games from the terminal simply by typing their names and hitting enter.
Also try running open office from the terminal simply by running openoffice and hit enter. If you get errors running these games or open office from the terminal, then post them here.

If you don't know how to get at your sources list (when you have just made one post) , open a Terminal and issue the commandand Copy and paste from there