it wont start correctly, clustered up my toolbar(its a big fuzz down there now),it wont let me download a new one, it wont even let erase it....it says make sure the disc is not full, what im not on a disc!!!!!!!...a screen just pops out of nowhere now and say" files appear invalid, generally caused b a corrupted installation..please try downloading and installing again....?!?!?!?!?!?!!?!?!?"........ ..it wont let me do either!!!!!.......please help