thnx maruf bro for this sollution......
i have another sollution.... u just have need to have a soft "WinRAR"
this is a common soft mainly used for zip or unizip file... but u can also use this soft for detecting virus......
If you have this soft then just follow these steps....
1. open the soft.
2. now u will see there is a tab at the top of this soft. After connect pendrive just clik that tab.
3. now choose ur pen drive's drive or location..
4. you will see the file list inside the pendrive including hidden files.
5. you know what is ur files. so just delete the unnecessary file (most of the time virus)....
6. Stay safe & enjoy.......