^ i dont like turning mine either for the simple fact that i do watch movies on my computer since i hooked up my 2nd monitor as a lcd plasma tv 47 inch
so i go on my sofa and just relax and enjoy the show
but if i do have it on i just turn on my matrix :P
... it's called password upon return from screen saver
to fix this, right click on ur desktop, go to properties (or personalize) select screen saver and set it to non, or just untick the "on resume, password protect" if you wanted to save energy
I personally keep mine on all day and let the screen's auto shut down kick in rather than cheesy screen savers
granted this is for my home, if you are on a corporate computer, best not to change this as this is a security thing rather than a convenience thing.