Microsoft Windows Defender can contribute to linked-clone OS disk growth and increase IOPS in linked clones and full virtual machines. Disable Windows Defender if you install other anti-spyware software on the virtual machine.

If Windows Defender is the only anti-spyware installed on the virtual machine, you might prefer to keep Windows Defender active on the desktops in your environment.

Procedure
1

In vSphere Client, select the parent virtual machine and select Open Console.

2

Log in to the Windows 7 or Windows 8 guest operating system as an administrator.

3

Click Start and type Windows Defender in the Search programs and files box.

4

Click Tools > Options > Administrator.

5

Deselect Use this program and click Save.