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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!!!