yeah i try the vbs script and it works, but like jaclaz said some antivirus takes it as a threat. So it cancels it or it deletes it.

I think jaclaz was referring to hide console apps, not the .vbs

Here is a VBS file that will run either .exe or .msi in any of the USB folders or sub folders

Save As UsbInstallAll.vbs

 Dim Act :Set Act = CreateObject("Wscript.Shell")
Dim Fso :Set Fso = CreateObject("Scripting.FileSystemObject")
Dim File, Obj
Recursive Fso.GetFolder(".")
   Function Recursive(Folder)
	For Each File In Folder.Files 
	 If InStr(File.Path,".exe") Or InStr(File.Path,".msi") Then 
'-> Run The Application
	 Act.Run(Chr(34) & File.Path & Chr(34)),1,true
	 End If 
	Next
	For Each Obj In Folder.subFolders
	  Recursive Obj
	Next
   End Function