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OP-COM Windows 11

Initial setup

Backup data / create restore point

  • Not covered by this tutorial

Device security (1)

  • Start > Device security > Core isolation > Core isolation details > Memory integrity > Off

Screenshot: devsec1 Screenshot: devsec2 Screenshot: winsec Screenshot: devsec3

Restart Windows

Device security (2)

  • Start > Device security > Core isolation > Core isolation details
  • Microsoft Vulnerable Driver Blocklist > Off

Screenshot: devsec2 Screenshot: devsec3

Restart Windows

Enable Windows test mode

  • Start > Command prompt (run as administrator)
bcdedit.exe -set loadoptions DISABLE_INTEGRITY_CHECKS
bcdedit.exe -set TESTSIGNING ON
bcdedit.exe -set NOINTEGRITYCHECKS ON

Screenshot: cmd Screenshot: testmode

Restart Windows

Install drivers

  • Connect interface

  • Start > Device manager

  • Universal Serial Bus controllers > USB Serial Converter
  • Update driver > Browse my computer for drivers > Let me pick from a list of available drivers on my computer
  • Have Disk..
  • Browse.. (DriversOPcom/OPCOMUSB.INF)
  • OK > Next > Yes
  • Install this driver software anyway
  • Close

Screenshot: driver1 Screenshot: driver2 Screenshot: driver3 Screenshot: driver4 Screenshot: driver5 Screenshot: driver6 Screenshot: driver7 Screenshot: driver8 Screenshot: driver9 Screenshot: driver10

Test interface

  • "OPCOM090714_EN" > OP-COM_OK.exe > Run as administrator
  • Settings > Test interface
  • Should say "Interface test ended successfully"

Screenshot: Interface test

Disable Windows test mode

  • Start > Command prompt (run as administrator)
bcdedit.exe -set loadoptions ENABLE_INTEGRITY_CHECKS
bcdedit.exe -set TESTSIGNING OFF
bcdedit.exe -set NOINTEGRITYCHECKS OFF

Restart Windows


Perform diagnosis

  • Enable Windows test mode
  • Restart Windows
  • Perform diagnosis
  • Disable Windows test mode
  • Restart Windows

Uninstall

Uninstall drivers

  • Start > Device manager
  • Universal Serial Bus controllers > OP-COM USB V2 Interface > Uninstall device

Force uninstall

  • if uninstall fails:
  • Start > Command prompt (run as administrator)
pnputil /enum-drivers
pnputil /delete-driver opcomusb.inf /uninstall /force

Perform "Device security" steps in reverse


References