SOLVED! Service Host: Unistack Service Group

If Service Host: Unistack Service Group keeps hogging all the Disk resource, it could be glitching out and you should end it. Additionally, you should disable auto-update, clean boot, update Windows and so on. You need in-depth instruction on how to troubleshoot the high Disk usage of Service Host: Unistack Service Group. In that case, you should find this article useful. 

What Is Going On


All in all, Windows and its components give a good account of themselves for most of the time. That being said, it’s not uncommon for Windows users to run into glitches every now and then. If you notice Service Host: Unistack Service Group using a lot of Disk resource, it’s strongly recommended that you give glitch some thought. 


In case you don’t know, Unistack Service Group contains a service named UniStore which is a part of Store. If Store is downloading and installing updates for Store apps on your computer, the disk usage of Unistack Service Group would spike. 


Unable to recall the last you updated Windows? Then there is a good chance that your version of Windows is out-of-date. Obsolescence results in many issues and services hogging resources is a prime example. 

Approaches To The Situation

End Task

  • Step 1: Right-click an empty spot on the taskbar then pick Task Manager.
  • Step 2: Locate Service Host: Unistack Service Group, select it and choose End task.
  • Step 3: Resume using your computer like usual. 

Turn Off Auto Updates 

  • Step 1: Go to the search bar, type store and press Enter. 
  • Step 2: Click on the three dots at the top-right corner to open Store settings.
  • Step 3: In Settings, toggle the option Update apps automatically off.
  • Step 4: Close Microsoft Store, restart your PC and see how things turn out. 

Clean Boot

  • Step 1: Go to the search bar, type MSConfig, and press Enter.
  • Step 2: In System Configuration, navigate to the Services tab and check the Hide all Microsoft service checkbox.
  • Step 3: Choose Disable all, select Apply, go to the Startup tab and hit Task Manager.
  • Step 4: Proceed to disable everything you see (but keep them in mind as you will enable them later).
  • Step 5: Return to System Configuration, choose Apply and select OK.
  • Step 6: Restart your computer.

Update Windows 

  • Step 1: Press Windows + I to open Settings choose Update & Security and select Check for updates.
  • Step 2: If an update is available, allow Windows to download and install it.
  • Step 3: When the update wraps up, restart your computer.
  • Step 4: As the screen comes back on, open Task Manager again and determine whether the issue persists. 

What Exactly Is Service Host Unistack Service Group?

 Unistack Service Group provides apps access to structured user data, including messages, calendars, and contact info. If you stop or disable the service, apps that use data from it won’t work correctly. The processes in the Unistack svc are:

  • User data access
  • User data storage
  • Contact Data
  • Sync host

How Do I Maximize My Computer Memory?

If you need your PC to allocate more resources to processes, consider adding another RAM stick to the motherboard. By doing so, you will give the pass more memory to use and your PC won’t get sluggish if you open multiple windows.

Should I Upgrade RAM Or Pick Up An SSD?

Generally speaking, SSD helps people access files quickly and reduce power consumption while RAM boosts performance. Usually, a combination of both is going to grant the best experience on PC.


  • Avoid changing the registry files of the Unistack Service Group or deleting the folders containing data of the service. If you mess up, you could wreck your PC and disable a number of apps. Furthermore, the action could affect Windows system files and render your OS useless, needing a complete Windows reinstallation.
  • If your RAM is stretched out and your PC cannot run smoothly, consider restarting it. A restart should stabilize computer experience and resolve various hiccups. Also, you may want to disable non-essential apps that load on startups (Docker, Skype, etc) to reduce boot time. 
  • On Windows, many apps continue in the background. For example, Google Chrome could continue to hog memory resource and slow down computer processes. To resolve that, open Settings, click on Privacy and pick Background apps. Next, toggle the switch for the apps you want to stop. For apps like Google Chrome, you’ll have to open the settings of the app and disable background activity.
  • For optimal experience, you should uninstall apps you don’t use. If your PC contains too many apps and the drive is nearly full, the performance of your PC is going to suffer.
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