Blank Screen with cursor after login Windows 7, Unable to start new tasks

Question

My problem is similar to the well know Windows 7 Black Screen as referenced by Prevx, though different. When I boot my Windows 7 computer, the login screen appears as always. Following entering the password for default user,
the screen will give the impression of login, but the final result is a plain black screen with the cursor only. The black screen appears indefinitely and the Windows GUI never appears. The only available option from booting in normal mode with this is Ctrl-Alt-Del
(Task Manager). From analyzing another computer with Windows 7 Professional, my Task Manager is missing the following user processes: dwm.exe, explorer.exe, and taskhost.exe. Additionally, it is missing the following system processes (possibly irrelevant):
spoolsv.exe and wmiprvse.exe.
When I attempt to start a new process using Windows Task Manager, an error message will appear saying “Windows Task Manager has stopped working” and forces you to close Windows Task Manager. This includes starting
any process such as cmd or explorer.
I attempted to boot into safe mode. 
The result was the same as above. Then I attempted booting into safe mode with command prompt. This showed some hope. Following authentification from the login screen, the command prompt appears with the same blank screen with a cursor behind it. Initially
I attempted to run msconfig.msc to run a clean startup. System Configuration Utilities opens briefly then displays the error same as above. “System Configuration Utility has stopped working” and again forces the program to close. Then I tried to
open regedit. This works with no error messages! So I have access to the registry, but have no idea what I should modify to get my computer running normally.
Things I have tried:
1)   
Restoring to last know good configuration. (No result)
2)   
Repairing Windows configuration. (No result)
3)   
Scanning the drive 3 separate times for viruses with both Avast and Symantec. (No viruses detected)
4)   
Repairing the REG_SZ value HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell as proposed in
http://social.technet.microsoft.com/Forums/en/w7itprogeneral/thread/5b94b775-992e-4f48-b3ff-c89b3cf45e82
5)   
Executing Prevx’s fix file as proposed in
http://www.prevx.com/blog/140/Black-Screen-woes-could-affect-millions-on-Windows--Vista-and-XP.html
Any ideas are much appreciated.
Thanks,
John

Answer 1

Same problem  I've found a solution.
#1 Hit fastly 5 time the left shitf button on your keyboard.
A windows will appaers to know if you want to caps lock. Keep it open
#2 Alt-CTRL-Del
  You have know your desktop
#3 Go on add-remove programme
3a) Go on windows add-remove
3b) Remove internet explorer
ok-ok-ok - untill it's remove and ask to restart
#4 No more problem. You have to go on the net with chrome or firefox.