Tech Support: Black Screen - Can't Run Explorer.exe With Task Manager

Black Screen - Can't Run Explorer.exe With Task Manager

Hi guys
I have been Googling the answer to this for the last day and nothing has seemed to work.
Basically, my laptop was
working fine until this morning, when I restarted it.
After the Welcome screen, just a back screen with the mouse.
CTRL ALT DEL and all that still work normally.
I can run programs with Task Manager but can't run explorer.exe.
It comes up in the Processes
for about 10 sec then disappears.
I believe this is the cause for the black screen.
I have tried downloading a clean explorer.exe and replace the explorer.exe in C:\Windows\.
My computer didn't allow it as it said I need administrator's permission but of course
I'm the administrator so I don't know what that's about. 
I tried rebooting in Safe Mode and that works fine, still I can't replace the explorer.exe in the C:\Windows\ because I don't have administrative permission.
I tried to change it in the Security
tab in Properties, couldn't either. 
I have also tried to Update Driver Software of the Display Adapters, checked the Shell value in the registry and made sure it was explorer.exe, used the Black Screen Fix from Pevx, used HitmanPro
and Windows Malicious Software Removal Tool to scan and delete malwares.
I even did a scf /scannow, checked driver C for error (which took 3hrs!!!), let Windows StartUp Repairs sort things out, attempted a System Restore but failed.
It said the antivirus (Sophos)
was preventing the system restore so I temporarily disabled its on access scanning but still can't restore to an earlier point (11/01).
The only recent program changes as listed in the system restore is Google+ Auto BackUp which
came when Picasa updated 3 days ago and a newer version of Facebook Video Calling which I never used.
I'm now running a scan with Sophos, not too promising.
So yeah, I have tried everything.
I think there's only three options now:
1.
Somehow replace the explorer.exe in C:\Windows\ with this new fresh explorer.exe I downloaded, with an administrator's permission
2.
Attempt another System Restore but I'm sure nothing will happen again, already tried three times.
3.
Reinstalling Windows 7 Home Premium.
This will be a real pain.
So PLEASE HELP ME!!! I have coursework to hand in on Monday and this laptop is
not letting me doing anything.
THANK YOU!!!

Keys to the Problem Black Screen - Can't Run Explorer.exe With Task Manager

Download SmartPCFixer to Fix It (Free)

Please ignore my other long reply.
The problem has now been sorted.

After trying all sort of scannings, drinking and sobbing, I came across TDSS Killer from Kaspersky which managed to catch 1 last single malware (which I was too stupid and hopeless to actually looked at and remember the name of), it cured the problem after
rebooting.
The laptop is now running fine like you wouldn't believe.
I'm still baffled but way too overjoyed now to care.
Thank you very much for your help nevertheless!

Using System Restore

• Click on the Start button on the Taskbar.
• Type "System Restore" (without quotes) in the Search box and hit Enter or,
• Click on System Restore (when you see System Restore pop up  in the list of search results).
• Make sure the "Recommended restore" radio button is checked on the restore utility window.
• Click on Next and follow the instructions given.

Note: There is the option on the restore utility to select "Choose a different restore point". Unless you have a specific reason to select a different date and time than what Windows recommends, just select the recommended option stated in the steps above. If you choose to select another one, follow these steps:

Click on that desired date and time, and Windows 7 will perform a scan for any affected programs in that restore point.

Once completed, click Next and follow the instructions given.

Once you have selected the restore point, your system will start the restoring process, after which you will have to restart the system.

Recommended Method to Repair the Problem: Black Screen - Can't Run Explorer.exe With Task Manager:

How to Fix Black Screen - Can't Run Explorer.exe With Task Manager with SmartPCFixer?

1. Click the button to download SmartPCFixer . Install it on your computer.  Open it, and it will perform a scan for your computer. The junk files will be shown in the scan result.

2. After the scan is finished, you can see the errors and problems need to be repaired. Click Fix All.

3. The Fixing part is finished, the speed of your computer will be much higher than before and the errors have been removed.

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