Hi All, Just hours ago Windows Defender (Windows 8 ) "detected" and asked for my permission to send to Microsoft for analysis the "unknown to them" system file "ntoskrnl.exe" (NT kernel & system type) located at C:\Windows\System32. Needless to say this is way strange since it is a system file, however on the file properties it says it was created just yesterday Feb.12th so I thought it's because the latest MS updates installed yesterday. HitmanPro, Avira, Kaspersky TDSSKiller and F-Secure didn't find anything. Is it something to be concerned about? Thanks.