[Windows 10] I installed antivirus software, but Windows Defender will not be disabled.

Category FAQ
Model

[TOUGHBOOK]
CF-20[A/B/C/D] (mk1)
CF-31[1/2/3/4] (mk5)
CF-33[A/B/C/L/M/N] (mk1), CF-33[D/E/P/Q] (mk1)
CF-53[2/3/4/5/7] (mk4)
CF-54[A/B/C] (mk1), CF-54[D/E/F] (mk2), CF-54[G/H/J] (mk3)
CF-D1[N/Q] (mk3)
CF-MX4E (mk1)
CF-SX4E - Asia model (mk1)

[TOUGHPAD]
FZ-G1[J/K/L/M/N] (mk3), FZ-G1[P/Q/R] (mk4)
FZ-M1[E/F/D] (mk2)
FZ-Q2F[1/5/6/7] (mk1)
FZ-Y1[C/D] (mk2)


* The target models are Windows 10 Pro 64bit Anniversary Update [Ver.1607 Build.14393] pre-installed model.

Operating System Windows 10 Pro 64bit Anniversary Update [Ver.1607 Build.14393]
Language English
Release Date 7/27/17
File Name FixWDpv.exe 346,808 bytes
StepbyStep_WindowsDefenderSettingtool.pdf 78,343 bytes
Index No 75345

Question

I installed antivirus software, but Windows Defender will not be disabled.
What should I do now.

Answer

Windows Defender which is Microsoft's anti-virus software may not be invalidated when anti-virus software is installed on target model.
Please check the improvement method and execute the improvement tool.
Download and apply the improvement tool of the following link destination.

How to improve:

We've offered the "Windows Defender setting adjustment tool" for this issue.
Please apply from the link below.
If you shut down the PC which operation slowed down completely (or Shutdown with high speed startup invalid, or forcibly turn off), you can download the tool to USB memory with another PC and start up the slow PC in safe mode to take countermeasures.
Please refer to the step-by-step procedure [StepbyStep_WindowsDefenderSettingtool.pdf] for details.

∗ This information may be changed / added without notice, please understand.