My computer hard disk has 3 partitions and Windows is installed in C:\, the other two being D:\ and E:\. My external drive is usually read as I:\.
The issue with the external is that I am unable to view any folder in the root directory (i.e. I:\). When I copy anything from C, D or E:\ (say, 'E:\Pictures') and paste it into the root directory of the external drive (to 'I:\Pictures'), this newly copied folder on the external drive gets hidden somehow.
Instead, a shortcut with the same name is created in place of the folder, i.e. a file named 'I:\Pictures.lnk' is created. Nothing happens to any file in C, D or E:\. So, when I open my hard disk, all I see are shortcuts instead of actual folders. To access the folders, I need to type the path in the address bar on Windows Explorer.
Now, when I check the properties of this shortcut file (I:\Pictures.lnk), the target is shown as "C:\Windows\system32\CMD.exe /C Start WScript.exe 131\i0e0e.js &START EXPLORER "Pictures"". That's why nothing seems to happen when I double click on these shortcuts.
On most computers, even after disabling hidden folders from the Control Panel, the original folder (I:\Pictures) on the external cannot be located. But on some computers, the original folder can be located as a hidden folder. This could be, I guess, because of some difference in folder settings.
Although this malware does not affect my computer's performance as such, it does infect every USB Drive that is connected to it. After you helped me clean my computer, I haven't attached any new USB to check whether this is still active or not on the computer. But it is still present in the external.