How to Enable Task Manager & Folder Options......

Folder Options Enable:
Start>>Run
write gpedit.msc >> OK
Group Policy open ---
User Configuration>>
Administrative Templates>>
Windows Components>>
Windows Explorer
"Remover the folder options item from the Tool menu"
Double click and select "disabled"

Note: "Disabled" because virus is enable this option.

Now go to Folder Option>>View
Remove the tick option from "Hide Protected Operating System File" and again search to remove UNSPECIFIED file from SYSTEM, SYSTEM32 & WINDOWS. Then restart. After restart if you found FOLDER OPTIONS from Tools, you succeeded to completely remove viruses. If not, virus couldn't removed........:-)

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TASK MANAGER ENABLE:
Start>>Run
write gpedit.msc >> OK
Group Policy open ---
User Configuration>>
Administrative Templates>>
System>>
Ctrl+Alt+Del Options>>
"Remove Task Manager"
Double click and select "disabled"

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REGISTRY EDITING ENABLE:
Start>>Run
write gpedit.msc >> OK
Group Policy open ---
User Configuration>>
Administrative Templates>>
System
"Prevent Access Registry editing tools"
Double click and select "disabled"

resource: Internet