4.5. Optimizing background processes on Windows virtual machines

To optimize the performance of a virtual machine (VM) running a Windows OS, you can configure or disable a variety of Windows processes.

警告

Certain processes might not work as expected if you change their configuration.

Procedure

You can optimize your Windows VMs by performing any combination of the following:
- Remove unused devices, such as USBs or CD-ROMs, and disable the ports.

Disable background services, such as SuperFetch and Windows Search. For more information about stopping services, see Disabling system services or Stop-Service.
Disable useplatformclock. To do so, run the following command:
```
# bcdedit /set useplatformclock No
```
Review and disable unnecessary scheduled tasks, such as scheduled disk defragmentation. For more information about how to do so, see Disable Scheduled Tasks.
Make sure the disks are not encrypted.
Reduce periodic activity of server applications. You can do so by editing the respective timers. For more information, see Multimedia Timers.
Close the Server Manager application on the VM.
Disable the antivirus software. Note that disabling the antivirus might compromise the security of the VM.
Disable the screen saver.
Keep the Windows OS on the sign-in screen when not in use.