Definition Update for Windows Defender - KB915597 (Definition 1.97.1491.0)__
Read More:Error 0xc0000034 for Windows 8 after Hibernation,Can't download NET Framework 3.5 and .NET Framework 3.5 Service Pack 1,Accidentally click 'Refresh your PC' on windows 8 , thought it will just refresh my pc and keep my important files.
