Cant access anything on my windows 7 pc

Registration date
Friday September 14, 2012
Last seen
September 14, 2012
Hello, im on windows 7 and i cant access anything cant open control any program not the command prompt not computer to get to my drives no file i can right click on stuff but it wont open anything i turned the computer off and then back on and it said the the pc couldnt start it ran the startup repair eventually came back on but was still the same when i do try to open something it says something about downloading program if i already have one i need to associate it or something like that basically all it will do is let me click the start button but nothing in the start menu or anywhere else except for shutdown if anybody has any suggestions i would be most grateful THANKS A BUNCH