One of the frequent reasons for this issue is the power management settings of the Network Adapter. If your network adapter is set to wake the computer, it can conflict with the sleep function. By adjusting the following settings, you can ensure that Windows enters and maintains sleep mode without interruptions. Here, we’ll go through solutions to resolve this issue step by step.

Link State Power Management (LSPM) is a feature in Windows designed to reduce the power consumption of PCI Express devices, such as network adapters, when they are idle. While intended to conserve energy, this feature can sometimes interfere with sleep mode, causing the computer to wake up unexpectedly. This occurs because the network adapter might send a wake signal during power state transitions, disrupting the sleep process.

2. Configure the Power Management for the Network Adapter

If your network adapter is set to wake the computer, Windows might either not enter sleep mode or wake up unexpectedly. To prevent such issues, adjust the network adapter’s settings so that it won’t wake the computer during sleep mode.

3. Disable the Hibernate Feature

4. Disable Fast Startup

The Fast Startup feature works in combination with hibernate to reduce boot times. With Fast Startup enabled, Windows doesn’t perform a full shutdown. Instead, it saves the current system state to a hibernate file, allowing the computer to quickly resume from this state during the next startup, significantly reducing boot time. However, Fast Startup can sometimes cause problems with sleep mode, leading to issues where the system fails to enter or maintain sleep mode correctly. Disabling it can help resolve these conflicts.

5. Perform a Clean Boot

If the issue persists, a third-party application or background service might be interfering with sleep mode. To identify the cause, you can perform a clean boot. This process disables all non-essential third-party services and startup programs, allowing you to identify which application or service is preventing Windows from entering sleep mode.

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