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Booting a Windows guest operating system into Safe Mode (1004011)

Last Updated: 3/13/2023Categories: How toTotal Views: 75048Language:
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Learn how VMware Skyline Advisor and Skyline Health Diagnostics work together to provide proactive intelligence and self-service log analysis.

Use Skyline Advisor to avoid issues before they occur across VCF, vSphere, vSAN, NSX, vROps & Horizon. Skyline Findings are based on top KBs, VMSAs/CVEs and design best practices.

Use Skyline Health Diagnostics to root cause vSphere & vSAN logs when an issue occurs. Skyline Health Diagnostic Findings are based on top KBs and VMSA/CVEs. You can use the Skyline Health Diagnostics tool in online or offline mode.

If you require additional help from technical support, please use Skyline Advisor to initiate a Log Assist to reduce time to upload logs. TSEs can also initiate logs to reduce effort.

Symptoms

A guest or host Windows operating system:

Has failed

Has stopped responding and displays a blue screen with a stop code

Has stopped responding

Keeps restarting for no apparent reason

Has performance problems

Is slow

Has an application that is not working properly

Is experiencing network problems

Purpose

This article describes how to start any version of a Windows operating system in Safe Mode. Safe Mode disables all third party applications and non-essential Windows services. If the symptoms are resolved when using Safe Mode then the source of the symptoms are related to a third party application or non essential Windows service, not Windows itself.

Resolution

To start any version of a Windows operating system in Safe Mode:

Caution: Depending on your problem, performing this procedure may remove a software environment that is required to test the health of your operating system.

Restart the operating system or power off and power on the computer.

When the computer starts, press and hold F8.

Notes:You are presented with a text menu of start options.

Note: If you do not see this text menu and Windows boots normally, repeat steps 1-2.

Depending how your keyboard is configured, you may need to press fn+F8 rather than just F8.

You may see a series of messages that display information about hardware and memory. This is called POST information. If you see POST information, you do not need to press F8 until the screen goes black. Ensure the mouse focus is inside the virtual machine by clicking inside the console window and that you press F8 in a timely fashion. Windows can start very rapidly, and it may take several attempts to catch the Safe Mode screen. To delay the POST information screen, see Accessing the BIOS when the POST screen clears too quickly (1004129). In vSphere HTML Client, you can apply a startup delay using the virtual machine settings wizard using the "Boot Delay" option in "VM Options > Boot Options as shown in the screenshot below:

Select a safe mode and press enter.

If the operating system issues involve networking, select Safe Mode with Networking.

If the operating system issues do not involve networking, select Safe Mode.

If the symptoms are resolved when using Safe Mode, then the source of the symptoms are related to a third-party application or nonessential Windows service, not Windows itself. You can try selectively disabling individual services and startup applications to narrow the cause of the problem. For more information, see Using the Windows System Configuration utility (1004010). If the problem reoccurs, you may have to investigate uninstalling third-party software and Microsoft applications.

Related Information

Accessing the BIOS when the POST screen clears too quickly
Inicializando um sistema operacional Windows convidado em Modo de Segurança
Arrancar en modo seguro un sistema operativo huésped de Windows
引导 Windows 客户机操作系统进入安全模式
セーフ モードでの Windows ゲスト OS の起動

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