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Windows 7: Unable to open Notepad,Task Manager ,Regedit

26 Jul 2014   #1

Windows 7 Ultimate x86
Unable to open Notepad,Task Manager ,Regedit

Today Suddenly I found notepad ,Registry and Task manager is not working.
I scan for virus using Mcafee antivirus but did not found any anything.My cousin brother was using my computer yesterday may he bought some virus in his pendrive.
When I open notepad i get this error " windows cannot access the specified device,path or file.You may not have the appropriate permission to access the item ".
I tried following four solution found regarding this error but none of this work.
1> sfc /scannow command (3 times)
2> Removed antivirus
3> System Restore
4> Permission for opening a file

However I can open notepad in safe mode .

Is there any other solution except Re-Installing Windows again.

Please Help me !

My System SpecsSystem Spec
26 Jul 2014   #2
Yard Dog

Win 7 Home Premium SP1 32 bit

Hello.. run malwarebytes . : Malwarebytes Anti-Malware Free
My System SpecsSystem Spec
26 Jul 2014   #3

Windows 10 Pro X64

My System SpecsSystem Spec

27 Jul 2014   #4

Windows 7 Ultimate x86
Thank you everybody ......

I scan with MalwareBytes and it removed all virus and now everything is allright .
My System SpecsSystem Spec
27 Jul 2014   #5
Yard Dog

Win 7 Home Premium SP1 32 bit

Great . Now run this to make sure all files are intact : SFC /SCANNOW Command - System File Checker
My System SpecsSystem Spec

 Unable to open Notepad,Task Manager ,Regedit

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