Im having a similar issue to killerx525 in this thread http://www.bleepingcomputer.com/forums/topic448270.html
I didnt want to hijack his thread so i started this one.
I get the black screen with only the cursor after typing in my password.
It seems to be related to my network though. When i disconnect my LAN cable or boot into safe mode (without networking) it boots fine, then i plug in my LAN cable once windows has finished booting.
I noticed this because over the past few days (when i could sometimes boot with the LAN cable connected) it wouldnt connect to the network without the cable being disconnected and reconnected.
Im also having issues connecting to 192.168.1.1 in my browser (yes this is my router address and i can connect using another computer).
I have had a quick browser through the event viewer but cant find anything obvious that it could be. I will save todays events and upload if anyone needs to see them.
I have ran a scan with malwarebytes and MSE and both come up clean.
I am running a custom build which has been fine since building it in January. Im running windows 7 Professional x64 with 8GB RAM and a Crucial M4 SSD with the OS on.