Problem : You are misusing double quotes here => Startup\"
Soultion : you need to properly pass arguments to Process.StartInfo() .
Your first parameter should be file name and second parameter should be arguments.
Try This:
System.Diagnostics.ProcessStartInfo psi2 = new
System.Diagnostics.ProcessStartInfo(@"xcopy.exe", "E:\\Debug\\VipBat\\* \"C:\\Users\\VCCS\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\Startup\\\" /s /i /y");