Unity doesn't show text and graphics in the interface, and it is really slow!

I am a newbie in Unity and I had a problem with the Editor.
Its been a little while since I was using Unity, but then, one of this days, Unity just stops showing the titles in the interface, like the folder names. It only shows the window menu bar titles. And also it doesn’t show any 3d graphics at the 3d view or in the game view, and It is very slow. There is a warning sign in the status bar that doesn’t says anything, but when I click it, the window that appears shows a lot of warning signs that also doesn’t have any text, but that continue growing in quantity and the program gets slower and slower.

I tried to reinstall it, but didn’t work. I even tried to delete any trace of the program but every time I reinstall it, when I run it, the same happens.

I don’t know if there is a compatibility issue. My computer is a Laptop Samsung, with Windows 7 Home Premium, Intel Core i3 2.40GHz, 4gb Ram, 64-bit OS, Intel HD Graphics. I have Blender installed too.

Sorry about my english and Thanks!!

that sounds very strange, it may be a graphics driver issue, try another version of the driver if there is one available, and after all that contact support with your exact situation specificatons