MSE immediately came up after installation completed. Backdoor:Win32/Numnom.A Details- Category: Backdoor Description: This program provides remote access to the computer it is installed on. Recommendation: Remove this software immediately. Microsoft Security Essentials detected programs that may compromise your privacy or damage your computer. You can still access the files that these programs use without removing them (not recommended). To access these files, select the 'Allow' action and click 'Apply actions'. If this option is not available, log on as administrator or ask the local administrator for help. Items: file:C:\Users\Kevin\AppData\Local\Temp\WinVolumeSDK.exe
Just for the fun of it, I tested this myself, and same thing came up in NOD324.0 : Backdoor/Trojan:Win32/Numnom.A