ws.trojan.h / SanDisk Cruzer Edge 16GB USB Flash Drive

I had just closed down a Word document on my XP desktop and foolishly removed the above flash drive without going via 'remove hardware'.

 

Immediately there was a message from my Norton IS (latest, I think) that "Norton is investigating . . . ws.trojan.h".

 

I rushed to my Win7 laptopn and found threads on the sandisk forum suggesting that Norton were in 'false positive' mode:  http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/Cruzer-Blade-Issues/td-p/251512

 

By the time I came back to my desktop, the Norton message had gone. How do I find out the results of the investigation. please?