This would be the second time I’m getting virus on this computer. First time was a small one, wherre AVG can kill it without a problem, the virus did not appear anymore after the vault. However, this time, this viruses were running too much, too much on external disk (Weird thing is it happen on my pendrive only, not on my external HDD though). Some people call it as s07[1].exe, but it usually appear with another 2 more exe files, they all work together in document, local setting in some temporary file. So once you plug in your pen drive, where it has an autorun.inf file in it, those viruses ran into the file and change the file so they can work.
It’s a Malware from my research on the internet, and they recommended lots of trojan removal softwares, which I never bother to install. And this is the easiest way to completely delete them, my way 
1, Open Notepad, write nothing save as autorun.inf
2, Plugin your pendrive (Your Antivirus might catch them again)
3, Copy and paste autorun.inf to your pendrive, replace it!
4, Right-click and properties autorun.inf and check the “Read-only”
5, Scan you computer, make sure your Antivirus lock them or delete them.
Done! This is to prevent the virus to be able to re-write the auntorun.inf. For some reason, they just don’t die so easily 
Now, you have a cap on your pendrive, use as usual. But honestly, I always don’t recommend people to exchange file with pendrive, exchange using email is the priority for me 
