White Cursor on Black Screen - Vista

I've had to deal with this problem on quite a few Vista machines but never found an answer that works. There is advice to check a registry setting but that has never fixed my problem.

Even Microsoft seem to throw up their hands and avise a clean installation in


but surely there must be some way of resolving this without such drastic measures.

Currently I have a laptop stuck on a black screen with just the cursor movable and if anybody can help out I would appreciate it..


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How about the following:

We need to get the MBR on your HDD repaired.  You can do this with the retail copy of Vista Home Premium.  Thanks to Tom’s Tricks for typing these steps up:

When we try to boot after hardware testing procedures, we see just blank screen without any messages. It means the piece of code at the beginning of the MBR could not be executed properly. That’s why even error messages could not be displayed.  Also when we try to boot into Windows Vista, we see an error message like “Operating System not found” and this error occurs with a broken Master Boot Record (MBR).

To Restore corrupted Windows Vista Master Boot Record(MBR),follow the simple procedures.
You can use the Bootrec.exetool in the Windows Recovery Environment (Windows RE) to troubleshoot and repair the following items in Windows Vista:

A master boot record (MBR)

A boot sector

A Boot Configuration Data (BCD) store

Note When you are troubleshooting startup issues by using the Windows RE, you should first try the Startup Repair option in the System Recovery Options dialog box. If the Startup Repair option does not resolve the issue, or if you must troubleshoot more steps manually, use the Bootrec.exe tool.

To run the Bootrec.exe tool, you must start Windows RE. To do this, follow these steps:

Put your Windows Vista installation disc in the disc drive, and then start the computer.

Press a key when you are prompted.

Select a language, a time, a currency, a keyboard or an input method, and then click Next.

Click Repair your computer.

Click the operating system that you want to repair, and then click Next.

In the System Recovery Options dialog box, click Command Prompt.

Type “Bootrec.exe”, (without the quotes) and then press ENTER.

Note: To start the computer from your Windows Vista installation DVD, your computer must be configured from BIOS to start from the DVD drive

Bootrec.exe options
The Bootrec.exe tool supports the following options. Use the option that is appropriate for your situation.


The /FixMbr option writes a Windows Vista-compatible MBR to the system partition. This option does not overwrite the existing partition table. Use this option when you must resolve MBR corruption issues, or when you have to remove non-standard code from the MBR.
Have you tried this:

 1.      Boot the affected machine, using a WinPE media.
        If you do not have a the ability to boot into WinPE, you can use Microsoft Diagnostics and Recovery Toolset (http://www.microsoft.com/downloads/details.aspx?familyid=5D600369-0554-4595-8AB4-C34B2860E087&displaylang=en)
2.       At the command prompt, launch regedit.exe and load the SYSTEM hive per the instructions in the following KB article(disregard the Remote Recover tool as it's not  
          necessary for this scenario).  http://support.microsoft.com/kb/934958
3.       After the hive is loaded, modify the following key value per the instructions below:
          Key:  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RpcSs
          Value Name:  ObjectName
          Old Value:  LocalSystem
          New Value:  NT AUTHORITY\NetworkService
4.       Unload the SYSTEM hive by single-clicking the root key(i.e. whatever name you provided it) and then click File -> Unload Hive. menu item.
5.       Exit regedit.exe
6.       Reboot.

Pulled from: http://social.technet.microsoft.com/Forums/en/exchangesvr3rdpartyapps/thread/213997fa-95c5-4530-ab19-7e9e50924816
alfaroAuthor Commented:
That's the reg change that never seems to apply to any of the machines I've encountered..
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Does any of the safe modes work (including the command prompt only)?
alfaroAuthor Commented:
No. I can't get any to work..
This procedure has helmed me on occasion in this situation: you can recover the entire registry from the backups held by system restore, the following applies to vista as well as xp, you can even apply the principles in the article but do it using the gui via a boot cd which makes life a lot easier....
Look if this helps :  http://www.logicitc.com/blog/?p=102            Vista KSOD
alfaroAuthor Commented:
All working fine now..


was the accepted method successful?  please post the result...
alfaroAuthor Commented:
I thought I had but yes it was just what I needed...
tx for the feedback !
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