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Black screen with cursor after boot

I have a Windows 7 Pro PC which boots into a black screen with a non-blinking cursor. The same when booting in safe mode. I can not do Ctrl-Alt-Del.
What could be the problem?

- Jac
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JacBackus
Asked:
JacBackus
1 Solution
 
aadi369Commented:
Best step :)

Its seem to be infected by any virus.....I sugget you to repair the win 7 os or install fresh copy of the OS.
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Sam Simon NasserCommented:
did you tried system restore?
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JacBackusAuthor Commented:
I have checked the disk for viruses, which I removed (no system files affected).
There is no restore point to do this. A fresh install is a lot of work.
I got the problem after reinserting the disk after I had scanned it in an other PC.
The PC with the problem is a HP Pro 3120 MT.

- Jac
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JacBackusAuthor Commented:
It looks like the problem occurs during the Session Manager initialization steps.
Then the screen is in graphics mode, but I suppose Winlogon.exe is not running.

- Jac
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JacBackusAuthor Commented:
I have run sfc /scannow offline. No joy...

- Jac
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nobusCommented:
>>  I got the problem after reinserting the disk after I had scanned it in an other PC.
  <<   with what scanner did you scan, and what exactly did  you do then?

this seems to be the cause
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JacBackusAuthor Commented:
With Kaspersky Anti-virus and Malwarebytes. Something I did many times before.
But I have another clue: I have scanned a HP notebook, from the same owner, that got the same treatment. With the same result.
It could indeed have something to do with the software on both machines. But I did not run the Windows versions on the disks when removed from the machines. And on the notebook disk, no viruses were found. So nothing should have changed on the notebook disk.
I thought that removing changed something, e.g. the BIOS changed AHCI to IDE or vice versa. But that is not the case.

- Jac
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nobusCommented:
in many cases, it is related to the video driver
did you run a startup repair yet? you can also do a system restore from the DVD :
http://www.sevenforums.com/tutorials/681-startup-repair.html      

maybe this helps also :  http://www.softpedia.com/get/Tweak/System-Tweak/Black-Screen-Fix.shtml
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jostafewCommented:
I had a similar problem with a Vista machine, I beleive it was related to a permissions problem if I recall. Pulled the drive and used another machine to browse its contents, and in doing so I had to take ownership of the files on the system. This fixed the permissions problem and the machine booted afterward. No promises on this one as it was a year or two back and I'm a little foggy on the details, but I'm pretty certain you would have to do this process for both the Users directory and Windows etc.
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JacBackusAuthor Commented:
Could well be. But how can I correct this? I can not run anything. So it should be something I can run through the registry of likewise. Or I should run this offline.

- Jac
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nobusCommented:
you can always boot from a live cd - to work on the disk contents
here a couple :
http://www.ubcd4win.com/                              ubcd  Win
ftp://ftp.gwdg.de/pub/linux/knoppix/KNOPPIX_V6.7.0CD-2011-08-01-EN.iso          Knoppix      

i find Knoppix easier to make, and to work with (no ownership problems)
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JacBackusAuthor Commented:
I have run takeown.exe and icacls.exe on the offline disk and this solved the problem. So it was a permissions problem. Thanks!

- Jac
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