Hi, This morning i installed w7. all fine until i restarted. after the windows is starting up (with the new icon) at the moment i should see the login page, the screen goes black. no mouse pointer no nothin' however sometimes i does work, but i'm not sure WHEN it works. i did all the startup repairs etc. nothing worked permanently. only after system restore it works ok, but then after the updates it wont restart. again it looks likes something is unstable since at one time it works and the other it won't. any ideas?