Open Command Prompt as Administrator
Type `diskpart` and press Enter
Type `list disk` and press Enter
Identify your pendrive by its size
Type `select disk X` and press Enter
Replace `X` with the correct disk number
Type `clean` and press Enter
Type `create partition primary` and press Enter
Type `select partition 1` and press Enter
Type `format fs=ntfs quick` and press Enter
Replace `ntfs` with `fat32` if needed
Type `assign` and press Enter
Type `exit` and press Enter