if this is no it applied group policy.... or in company network
start computer in safe mode (before that update ur antivirus) and copy and paste below lines in notepad ..then file > save as > file type all file > folderoption.reg > double click on file... restart ur computer and check.. u need to full scan ur computer with latest antivirus..
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer]
"NoFolderOptions"=dword:00000000