Pen drive malfunction

[dix]

I purchased a Moser Baer 4 Gb Pendrive three months ago. But it displayed an error message yesterday when I plugged it into my friends PC. When I tried to open it it displayed an error message saying something like : Please insert a disk into drive H:

Is it damaged or is it some kind of virus??

[Log_net2]

try reformatting and also test in ( if possible virus free) other computers.