You maked a Windows bootable USB or pendrive for your PC and wanted to again make it to Normal pendirve.Then here is the tutorial the Make your Bootable Windows USB to Normal Position.
1) Insert Pendrive in to your PC USB sort.
2) Now open as Administrative Command Promt.
3) Enter the Following Command Lines.
Select Disk 1
(If your USB is on disk 2 Enter disk 2)
Create Partition Primary
format fs=ntfs quick
This Process take Time.
In this way you can Covert windows bootable pendrive to normal.We can also do this by using some third party softwares but this method is easy.