Random dbf file access is denied during data file update

Hi,

Encountered error during data files upgrade, some time lucky will be completed without issue.

Here the error screenshot:

Link: 

Activity captured by Process Monitor:

Main PC Spec:

- Virtual Machine in Hyper-V Cluster

- No of Virtual Processor: 6

- Virtual Memory: Dynamic Memory, max 16GB

- Virtual HDD: 3 (OS Drive, USB Data Drive, USB Backup Drive)

- Virtual Network: 10Gbps via Intel 10Gbps on physical server

- OS: Microsoft Windows Server 2012 R2 64 bit

- User session: Max 5 concurrent user session, all session have no UBS running during upgrade

Any help would be appreciated.

Thanks.

Ong, E.H