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Category: Desktops
Type: Question
Author: Elmo Rutger
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My PC encrypted with McAfee Endpoint PC Encryption software hangs at log on time and displays a black or blank screen.

Encryption user name and password can be entered successfully at the encryption log on screen, however PC hangs before the Windows log on screen appears.

Can someone assist me on this ?

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# Comment Id: 60021

There may be a problem with a connected device, such as en external USB printer, docking station or USB hard drive.

Please review the below instructions:

1. Power the machine off. 

  • If your PC is a laptop: Remove any device attached to the PC.  Examples can include external USB hard drive or USB printers.  If your PC is attached to a docking station or port replicator undock the PC.
  • If your PC is a desktop: Remove any device attached to the PC except for the keyboard, monitor and mouse.  Examples can include USB hard drive or flash drive or USB printer

2. Restart the PC and retry logon.

3. If you still see the problem when the PC has no device attached and is not docked and you are sure about the black screen (should not be a blue screen error), if you are using a Laptop, then perform a Power-drain.

Shutdown Laptop > Remove Power Adapter > Remove Battery > Press the Power Button 3-5 times to flush the possible static charge stored in circuits.

Then reseat the battery and try to power-on Laptop in the usual manner.

Hope this helps !

Best Regards


# Comment Id: 159430

Try the following steps:

Update your Video Card driver:

1. Right-click on your Taskbar and click on the Start Task Manager.

2. Click the explorer.exe on the Processes tab and click the End Process option.

3. Click File and then New Task.

4. Type explorer.exe and click OK.

5. Click the Start button on your Desktop and enter Device Manager in the text field. Click Device Manager from the result list.

6. Double-click on the Display Adapters and right-click on your display device. Click the Update Driver Software option and then follow the on-screen instructions.

7. Restart your computer.

Check on your registry:

1. Do the same steps 1-4 on the above first method.

2. Click Start and then type regedit from the text field. Click regedit.exe.

3. Navigate to the following: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

4. Click and select the WinLogon key and click Shell on the right pane. Check for the value of the Shell on the Data column. It should be explorer.exe. If its not explorer.exe, double-click Shell and type explorer.exe in the Value Data and click OK.

5. Close the Registry Editor window and restart your computer.

You may also try to run the System Restore while on Safe Mode.