How to Fix Windows 7 / 8 Start-up Problem
Always visit Black Screen Support Database: askpctech.blogspot.com/2015/01/black-screen-support-database-library.html
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This is may be your last chance, in many cases pc taking to store for re-installation or cs acted them self on re-installation, actually not all lost, there is a way manually work on your PC to fix it. There is different program can be used to do this trick, this is one of the free from one of the best anti-viruses on market made by E Kaspersky usa.kaspersky.com
Above video is created for these who already try steps 1,2 and 3 and other steps with command prompt
Solution 1: Restart the pc, login in to system to see black screen, PC must be connected to INTERNET, black screen is should not affect that, press Ctrl+Shift+Esc, to open Task manager, click on tub Application, click on New task, in opened window enter following command: "C:\Windows\explorer.exe". Explorer should start. Check your OS drive for system errors, by right click on drive "C" go to property and press check system for errors, select both boxes, click OK and restart your PC, let it scan at boot for system errors and repair them, it should take about 30 minutes, then restart your PC again, and you should be good to go
Solution 2: when Safe mode is not helping. Perhaps in safe mode we have only black screen with mouse cursor. Task manager is not loading. As reported by users, often the cause is external devices. For example, this happens if your computer is connected to an external hard drive or USB flash drive USB unplug them and reboot
Dos not hurt to temporarily disconnect from the local network - turn off the computer, unplug the Ethernet-cable, and load Windows 7 again.
If is a DVD or BlueRay drive there also remove it before restarting. If these solution wont help now it the time for heavy artillery and system recovery. In loading Windows 7 press F8 select. Select Repair your computer. In the new window, select the appropriate keyboard layout language (English, if the password to access the Windows 7 in English, to introduce English-language password). Then select the administrator account and enter the password. In the new window, click Startup Repair. If not help - do the same thing, and the next time, select System Restore, and then select a previous restore point and reboot
Solution 3: Assume that you can call the Task Manager (remember - when there was a black screen, press the key combination Ctrl+Shift+Esc), but the method is not saved Prevx. Then we will need the following judgment, which has helped many and proved its effectiveness.
[[In the Task Manager, click File New Task (Run). In the window that opens, type "regedit" and press Enter. ]] if [[....]] dosn't work fallowing the video.Go to askpctech.blogspot.com/2014/07/black-screen-of-death-with-mouse-cursor.html
to download Kaspersky Rescue Disk 10
Read here: askpctech.blogspot.com/2014/07/black-screen-of-death-with-mouse-cursor.html
... on How to record Kaspersky Rescue Disk 10 to an USB device and boot my computer from it?
After Registry editor is open, go to the following thread:
HKEY_LOCAL_MACHINE / SOFTWARE / Microsoft / WindowsNT / CurrentVersion / Winlogon
In the right pane, double-click on the key Shell if exist. Now attention - In the window should be specified only the value explorer.exe and nothing else.(not like this: iexplore.exe iexplore.exe/ anything after .exe need to be cleared ) If there is something superfluous - remove (for example, can be specified and the value logon.exe, in our case was extra - (,) after .exe). Should be left exclusively explorer.exe and everything. Reboot.
If the value explorer.exe and so indicated, remove the key Shell, then right-click, select New String Value, type the name of Shell and press Enter. Now again click on the Shell, enter explorer.exe, we click OK and reboot. .Continue suffering with a black screen Perhaps infiltrated virus or Trojan nahimichili registry. There are cases when the value Userinit. To fix this, open the Registry Editor as described above. Now go to the following registry branch:
HKLM\Software\Microsoft\Windows NT\CurrentVersion \Winlogon\Userinit
Double-click on the value Userinit if there is not specified c:\ windows\system32\userinit.exe, a problem is found. To remove or worse.
Now enter the following value:
Press F8 on load
Select Repair your PC.
run CMD path X:\\Windows\\system32
just type in regedt32.exe and press Enter.
Reg editor should open so just navigate in to
HKLM\Software\Microsoft\Windows NT\CurrentVersion \Winlogon\