Serious malware threat

Took 4 photos today with my Desire HD, downloaded photo to recently formatted PC running Windows 7 with Microsoft Security Essentials installed, generally update software every other day
Resized the image using Image Resizer Powertoy Clone for Windows (Brice Lambson)
As I was resising the images Microsoft Security Essentials informed me that one of the mages IMAG0307 (Medium).jpg as a serious threat
Exploit:Win32/MS04028!jpeg
http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?name=Exploit%3aWin32%2fMS04028!jpeg&threatid=2147572455

Trying to fathom out if it is a false threat, if the problem is with the PC or im my HD has picked up some malware, I rarely use it on the net, any comments or advice please