Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll

if you have messege error  in yours computer 

Unknown file in Winsock LSP: c:\windows\system32\nwprovau.dll 

step:

download file http://www.cexx.org/LSPFix.exe

and  Nwprovau.dll Run and move to the right and then remove.