Severe RAM Hoarding by Multiple "WorkloadsSessionHost" Processes on Windows 11 Home 25H2

Question

Hi everyone,

I am experiencing a severe performance bottleneck on my Lenovo ThinkBook G8+ 2026 laptop due to massive background memory consumption by a process called WorkloadsSessionHost. My system is currently running Microsoft Windows 11 Home, version 25H2.

When inspecting Task Manager, I noticed that there are at least 8 separate instances of "WorkloadsSessionHost" running simultaneously. Together, they are consuming a significant portion of my physical memory, pushing my overall RAM utilization to 73% even when the system is relatively idle.

To illustrate the scale of this issue, here is the rounded-up memory breakdown for the active instances of this process:

Instance 1: ~3,000 MB (originally 2,960.2 MB)

Instance 2: ~700 MB (originally 677.1 MB)

Instance 3: ~600 MB (originally 592.3 MB)

Instance 4: ~400 MB (originally 341.7 MB)

Instance 5: ~400 MB (originally 332.6 MB)

Instance 6: ~400 MB (originally 331.8 MB)

Instance 7: ~300 MB (originally 245.6 MB)

Instance 8: ~200 MB (originally 123.6 MB)

Despite reserving a combined total of nearly 6 GB of RAM, all of these instances show 0% activity across CPU, Disk, and Network columns.

Through some research, I understand that WorkloadsSessionHost.exe is associated with the Windows AI infrastructure (Windows AI Fabric / WSAIFabricSvc) and is linked to modern OS features such as Windows Recall, Copilot, Click to Do, and Live Captions. However, this extreme level of memory reservation, even when none of these AI features are actively being used, strongly points toward an aggressive preloading issue or a memory leak.

My Questions:

Is there a known memory leak issue with the Windows AI Fabric (WSAIFabricSvc) or WorkloadsSessionHost.exe on Windows 11 build 26200 (25H2)?

Since this process spawns multiple duplicate instances that silently hoard gigabytes of RAM, is there a recommended way to permanently limit its maximum memory footprint?

1. How can I safely disable or suspend these AI workload hosts without completely breaking essential OS functionalities?

Answer 1

Hello Dương Vũ Hải,

Welcome to Microsoft Q&A forum.

By the look of it, the memory used in this case is definitely not normal. I have checked the reports lately, however, I cannot find any reports regarding this. So, the best way for this is to submit it to the Feedback Hub app in your computer.

As of now, there is no built-in limit for this services, so the best way to go forward is to disable the features using this to reduce usage. For Recall and Click To Do, you can find it in Setting > Privacy & security.

If you rarely use them, another way to go is to disable the service itself:

• Open "Services"
• Find "Windows AI Fabric Service" or WSAIFabricSvc
• Right click the service and select "Stop"
• Go to Properties and change the startup type to "Manual"

I hope this helps.

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