Dear Ayub
There are 2 failure reasons for this :
1.The virtual machine time didnt lock ,we suggest you to  install it  by step according to our video 
2.The internet should be cut off when install,the inside of the vm network didnt turn off ,and you can not choose the synchronization inter time 
Best regards
Vanessa 
www.obd2express.com 

Hello Jaesuk,
Based on the software installation way you choose. One way does not need, one way need. Both way can install this software ready. You can see our software installation video.
Best regards
Ada
www.obdexpress.co.uk