File tmp.edb infected by Bloodhound.Olexe

NIS 2010 give me a warning that the file tmp.edb was infected by Bloodhound.Olexe and Auto-Protect has blocked the file.

I'm using Windows 7 Professional.

The file is found at path C:\ProgramData\Microsoft\Search\Data\Applications\Windows.

The file tmp.edb belonges in my opinion to Windows Update, so how could it be infected?

Could it be a false positve alarm?

 

Regards,

 

Ruud-Jan