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Windows 7: Black screen on startup after pceu virus fix

11 Jan 2013   #1
f1rz3n

Windows 7 Home Premium x64
 
 
Black screen on startup after pceu virus fix

okay, so here is the problem:

I had the pceu virus and have managed to get rid of that completely and now everything works fine except when I startup windows, after I logon there would just be a black screen and nothing else. I can get everything to work by pressing ctrl + alt + del and start task manager. Also, pressing the windows button does not open the start menu. Any ideas on how to solve this?

Thanks in advance


My System SpecsSystem Spec
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11 Jan 2013   #2
marsmimar

Microsoft Community Contributor Award Recipient

 
 

It's possible that there are still remnants of the pceu virus hiding within your computer. Or some other virus/malware. Regardless of which anti-virus product you used to remove pceu, no anti-virus product is 100% effective 100% of the time (if there was such a thing we'd all be using it.) Suggest you run a couple more free on-demand scanners. The more "no malware found" results the more likely your machine really is malware free.

Windows Defender Offline (disk must be prepared on a machine with no malware)

Malwarebytes

ESET Online Scanner

HitmanPro

SuperAntispyware

It's also possible that the virus may ahve damaged or corrupted system files. Run a system file checker scan from an elevated command prompt (option two.) If problems are found, run the scan 3 times and reboot the computer after each scan.

SFC /SCANNOW Command - System File Checker

If the black screen issue hasn't been fixed, you can try a startup repair. Run this tool 3 times and restart the computer after each scan no matter what the results are.

Startup Repair

Finally, one of the Forum experts prepared a couple of troubleshooting tutorials with some additional suggestions.

Troubleshooting Windows 7 Failure to Boot

Troubleshooting Steps for Windows 7
My System SpecsSystem Spec
11 Jan 2013   #3
mmkarimi

Windows 7 Ultimate x64
 
 

before that, I suggest you to make a new admin user, maybe this is the problem with your user,
My System SpecsSystem Spec
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11 Jan 2013   #4
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

so ctrl-alt-delete works. Can you start explorer.exe there?
My System SpecsSystem Spec
11 Jan 2013   #5
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Run regedit and goto key
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon

Do you see this?
[HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
"ExcludeProfileDirs"="AppData\\Local;AppData\\LocalLow;$Recycle.Bin"
"BuildNumber"=dword:00001db1
"FirstLogon"=dword:00000000
"ParseAutoexec"="1"

Please check if it's the same. No "shell" entry there?
My System SpecsSystem Spec
11 Jan 2013   #6
f1rz3n

Windows 7 Home Premium x64
 
 

Quote   Quote: Originally Posted by mmkarimi View Post
before that, I suggest you to make a new admin user, maybe this is the problem with your user,
I have tried with different users, no problem there.

Quote   Quote: Originally Posted by Kaktussoft View Post
so ctrl-alt-delete works. Can you start explorer.exe there?
Yes. (I can run everything fine just like normal with "run", I am using that laptop right now)

Quote   Quote: Originally Posted by Kaktussoft View Post
Run regedit and goto key
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon

Do you see this?
[HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
"ExcludeProfileDirs"="AppData\\Local;AppData\\LocalLow;$Recycle.Bin"
"BuildNumber"=dword:00001db1
"FirstLogon"=dword:00000000
"ParseAutoexec"="1"

Please check if it's the same. No "shell" entry there?
Yes, no "shell" entry.

Thank you guys for the quick replies as always.
My System SpecsSystem Spec
11 Jan 2013   #7
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

When you run explorer.exe all desktop icons appear again? Also the system tray... everything is working then?

Only that user has problems... all other user accouns are working fine?
My System SpecsSystem Spec
11 Jan 2013   #8
f1rz3n

Windows 7 Home Premium x64
 
 

Quote   Quote: Originally Posted by Kaktussoft View Post
When you run explorer.exe all desktop icons appear again? Also the system tray... everything is working then?

Only that user has problems... all other user accouns are working fine?
When I run explorer.exe it just opens a new explorer window and none of the usual thing happens so no icons / task bar / start button
My System SpecsSystem Spec
11 Jan 2013   #9
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Screen is totally blank, no gadgets, no background image,.... just blank?
Blinking cursor??
My System SpecsSystem Spec
11 Jan 2013   #10
f1rz3n

Windows 7 Home Premium x64
 
 

I do have a cursor yes.

btw, the values in Winlogon in regedit are a bit different from yours:

[HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
"ExcludeProfileDirs"="AppData\\Local;AppData\\LocalLow;$Recycle.Bin"
"BuildNumber"=dword:00001db0 (7600)
"FirstLogon"=dword:00000000 (0)
"ParseAutoexec"="1"

does this help at all?
My System SpecsSystem Spec
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 Black screen on startup after pceu virus fix




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