Because the software that saved in pendrive is copy from CD(Read/Write by DVD-Rom). Some of the DVD-Rom maybe too sensitive or not working properly, when copy some program to pc, it maybe not full copy or during the progress copy DVD-Rom make the program corrupted. And the error message will prompt.
To avoid the error message prompt, install the QnE software with using the admin account and CD to complete the installation. If direct install from CD, the software should not corrupted or missing.