Just scanned my computer with

Trend Micro HouseCall and it found a trojan…Troj SPNR.OBIR12

When I scanned with Avast it showed no threats. Why didn’t it find this Trojan?

No security program have 100% detection…if they did there would not be a virus problem
there is also a chance the detection by trend is a false positive ?

What file was detected as malware?
Where was it found…full file path?