Even though you can type now, i thought i'd mention a way, which should always solve the problem...
Click "all programs" then go up/down/left/right until you come across
accessories
then go down and click
system tools
then down to
system restore
then click that. After clicking that, choose a date in which you were able to write....this works with alot of things I.E. if screen doesn't load when trying to log in. But if the screen has never loaded or even let you type, then obviously you cant restore it.
Just spreading my love B-)
Paranormal :p