First of all, watch this:
There are a lot of questions that we get asked here WAY too often, and most of the time it has been answered before. Before you post a question, PLEASE use the search button and make sure it hasn't already been asked.
And now for the list of the most commonly asked questions:
1) OMG WHITE VIEWPORTS!
Click View >> Viewports >> Configure and choose a setup, then hit ok.
2) I can't select anything, and no menus come up when I right click!
Turn off anti-aliasing in your video card settings.
3) When I click on the Texture/Mesh browser nothing comes up!
Your desktop resolution may be set too low, and the menu is appearing just off screen. Temporarily raise your resolution and move the menu.
There are plenty of other questions that have been asked many times, so once again PLEASE USE THE SEARCH BUTTON before posting.
Or, as The G.o.a.T. would say, read the faq (link is in his signature). :up: