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Windows 7: Win 7: Black screen on boot up, before login screen?

04 Aug 2015   #11
GokAy

Windows 7 Ultimate x64 SP1
 
 

How are you loading the System Recovery Options? System Recovery Options

Can you get to F8 menu (Advanced Boot Options - Advanced Boot Options) and select "Last Known Good Configuration"?

Also try "Enable Low Resolution Video (640x480)" after that.


My System SpecsSystem Spec
.
04 Aug 2015   #12
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

I am able to use the "Repair Your computer" tools after pressing F8 during booting only . All other options leads to Black screen with cursor in the middle

Last Known Good Configuration leads to same

Enable Low Resolution Video (640x480) leads to same
My System SpecsSystem Spec
04 Aug 2015   #13
GokAy

Windows 7 Ultimate x64 SP1
 
 

See if you can actually open a task manager in black screen.
- Check if explorer.exe is running and start from CTRL+ALT+DEL (task manager - new task)

- Also try loading defaults in BIOS
My System SpecsSystem Spec
.

04 Aug 2015   #14
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

CTRL+ALT+DEL & Windows Logo Keys are not responding on Black screen.

What do you mean by "loading defaults in BIOS"? Is it a hardware reset?

Will it cause loss of Hard Disk data?

I did search in this forum.

The threads talked about additional issues upon BIOS reset. Am I heading there?

I ran the SFC again. I am attaching the zip file that contain CBS.LOG & [SR] tag extract (xxx.txt).
I did not any find ERRORS there, SFC ended with message saying "found corrupt files but was unable to fix some of them" . It is misleading. There is no [SR] tag pointing to corrupt files.

Does SFC through false positive like this?

I ran chkdsk. Results

File verification completed.
0 bad file records processed.
0 EA records processed.
CHKDSK is verifying indexes (stage 2 of 5)...
Index verification completed.
0 unindexed files scanned.
0 unindexed files recovered.
Windows has checked the file system and found no problems.
0 KB in bad sectors.

Failed to transfer logged messages to the event log with status 50.
My System SpecsSystem Spec
05 Aug 2015   #15
GokAy

Windows 7 Ultimate x64 SP1
 
 

Try scanning the harddisk with Windows Defender Offline - What is Windows Defender Offline? - Windows Help

Leave BIOS reset for later (it won't affect anything on your HDD but may require some confuguration "only if" you had changed settings yourself before.

Edit: Did you have Service Pack 1 installed on your PC? It looks like you did not..
My System SpecsSystem Spec
05 Aug 2015   #16
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

Thanks. I tried Windows Defender Offline. picked ( 2nd option ) On a USB flash drive.

I am getting "There was a problem formatting selected USB flash drive" Error Code 0007-80004005

I tried with different Flash drives. All gives same error. I manually formatted (FAT, NTFS, ...) the USB drives. Result is same.

I searched this forum. There are threads suggests to ISO format for USB.

How can I make this work?
My System SpecsSystem Spec
06 Aug 2015   #17
GokAy

Windows 7 Ultimate x64 SP1
 
 

Ok, re-run the downloader, but choose the 3rd option - As an ISO file on a disk (Advanced)
Download and run Rufus (https://rufus.akeo.ie/)
Select the USB flash (Device), the ISO file (CD icon midway down on the right) and click Start.

Then restart PC and boot with that USB flash drive.
My System SpecsSystem Spec
06 Aug 2015   #18
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

Thanks. I created WDO on CD instead of USB.

I used this CD to boot the infected PC. I ran the scanner. Here is the outcome

QuickScan - It did not find virus/Malware
FULLScan - It did not find virus/Malware (it took 4+ hours)

I back to square one

What else I can do from here?
My System SpecsSystem Spec
06 Aug 2015   #19
GokAy

Windows 7 Ultimate x64 SP1
 
 

Tried check disk yet?

Disk Check - Option 2 for you
Make sure you are selecting the correct drive letter. D in your case?
My System SpecsSystem Spec
06 Aug 2015   #20
MDRI

Win 7 64 bit, 6.1.7601 Service Pack 1 Build 7601
 
 

Yes , I did chkdsk /r on command line, because I was not able to get login. I posted the results earlier. Here you go again.

I ran chkdsk. Results for D:\

File verification completed.
0 bad file records processed.
0 EA records processed.
CHKDSK is verifying indexes (stage 2 of 5)...
Index verification completed.
0 unindexed files scanned.
0 unindexed files recovered.
Windows has checked the file system and found no problems.
0 KB in bad sectors.

Failed to transfer logged messages to the event log with status 50.

Updated on 8/7
============


Here are my HDD config:

Volume ### Ltr Label Fs Type Status Info
---------- --- ----------- ----- ---------- ------- --------- --------
Volume 0 F WDO_Media64 UDF DVD- Healthy
Volume 1 C NTFS Partition Healthy
Volume 2 D Windows7_OS NTFS Partition Healthy
Volume 3 E LENOVO NTFS Partition Healthy
Volume 4 G FAT Removable Healthy
Volume 5 LENOVO_PART NTFS Partition Healthy Hidden

I ran CHKDSK /F /X for C, D, E. All resluted to "Windows has checked the file system and found no problems."

F8 ===> Repair Computer===> Command Prompt ===> Works OK
F8 ===> Repair Computer===> Start up Repair ==> Results into "Startup repair could not detect a problem"

F8 ===> Repair Computer===> System Restore ===> "No restore points has been created on yout computer system drive"
F8 ===> Repair Computer===> System Image Recovery ===> "Windows cannot find a system impage on this computer"
F8 ===> Repair Computer===> windows Memory Diagnostiyics ===> "Black screen with Cursor in the middle"

After getting into Command prompt

I run net user

User accounts for \\

-------------------------------------------------
Administrator Guest
The command completed with one or more errors

It did not list other users in my laptop. I do not know why?

I need to pick the brain of this forum for these issues.

Thanks for looking into .
My System SpecsSystem Spec
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 Win 7: Black screen on boot up, before login screen?




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