Tutorials

▷ How to fix unistack Service Group (unistacksvcgroup) high CPU or memory usage

There is a tool called Task Manager that is pre-installed in all versions of Windows. You can think of Task Manager as a tool that can help you manage the tasks running in the background of the system. As soon as you open the Task Manager, you will see a list of services and processes. You will see a section called Background processes. This section will contain Windows services and processes and third-party applications. You will also see detailed information about processes and applications. The information you will be able to see will include CPU and RAM usage, network use, disk usage (reading / writing) and much more. The Task Manager can also be used to stop (force stop) or start services and / the processes. The ability to stop services is very useful in situations where a service or application stops responding.

There are a ton of services running in the background on your PC. Some of these services are third party services, while others are Windows' own services. One of these services is UnistackSvcGroup (it's not actually a service itself, but there are a couple of services that belong to this group). You may notice that this service runs in Task Manager and consumes a lot of resources. That's what most users complain about. It will stay there and you will not find this service available in the Windows service list. Therefore, you will not be able to deactivate it. What's more, may be suspicious to many users, as it uses a lot of system resources.

What is UnistackSvcGroup?

UnistackSvcGroup contains a service called UniStore and belongs to the Windows store. The reason you see this service running and using your resources could have to do with the Store updating its apps. Then, if you see this service in task manager service list, do not worry. UniStore is a legitimate service. Another service that may be to blame for this problem is the Userdatasvc service. This service is also part of the UnistackSvcGroup. Now there are some error possibilities and many users updated us on how to improve their system after a Windows update. Then, if you notice abnormal use, it could be a windows error. Nevertheless, there are a couple of things you can do to prevent this service from running, especially if you use a lot of your resources.

Method 1: use registry editor

You can change the values of some of the registry keys to disable the UnistackSvc service. Although it solves the problem for many people, we would not recommend it especially if you are not a technician. Registry changes need to be done very carefully and it can destroy your system if you make a mistake. Therefore, We suggest that you follow the steps given in other methods and follow the instructions in this step only if none of the other methods have worked for you..

Follow the steps below to locate and change registry values

Hold down the Windows key and press R
Type regedit and hit Enter

Now, navigate to this location HKEY_LOCAL_MACHINE_SYSTEMNCurrentControlSetNServicesNUnistoreSvc. If you are not sure how to navigate to this location, follow the steps below.
1. Find and double click HKEY_LOCAL_MACHINE in the left pane
2. Locate and double click on SYSTEM in the left pane
3. Find and double click on CurrentControlSet in the left pane
4. Find and double click Services in the left pane

Find and click on UnistoreSvc in the left pane
Find and double-click Launch Entry from the right pane

You should be able to see a new window and you should have 3 in the value data section. 3 means this service is manual. Change this value to 4 will fix the problem because 4 means this service is disabled. Please enter 4 in the Value data section and click OK

Now, locate the folder named UserDataSvc in the left pane and select it
Find and double-click Launch Entry from the right pane

You should be able to see a new window and you should have 3 in the value data section. We have to deactivate this service too. Therefore, scribe 4 in the Values data section and click OK

Close the registry editor and this should solve your problem

Method 2: disable automatic app updates

Since Microsoft Store uses this service to update applications, the problem will be solved simply by disabling the automatic update option for Microsoft Store apps. Follow the steps below to disable this option

Press the Windows key once
Select the Windows Store to open it

Click on the 3 dots in the upper right corner. The Windows Store settings screen will open. Note: If you don't see the 3 points, click on your profile photo icon at the top and select Settings

Disable the option to update apps automatically

That's all. You can close the windows store.

Method 3: update windows

Most likely it is a bug in Windows. Many users solved the problem simply by updating their systems. Then, if you haven't done it yet, update your windows. And if your system is already up to date, wait for the next windows update.

Method 4: delete the contents of the UnistoreDB folder

This service uses some files from the UnistoreDB folder, but we are not sure which one (s) exactly. Therefore, deleting the contents of the whole folder after terminating the running service will solve the problem.

Note: Deleting the contents of the UnistoreDB folder will break your People and Mail apps. Therefore, proceed only if you agree to work without these apps.

Open Task Manager by pressing CTRL keys, SHIFT and ESC (CTRL + SHIFT + ESC)
Look for the service, right click and select End Task
Repeat the previous step for all Unistore-related services that you can find
Close Task Manager
Hold down the Windows key and press E
Type C: NNNNNNNNN User profile name Apply Data / LocalCommsN-UnistoreDB in the address bar of your file explorer and hit Enter. Replace the profile name with the actual name of your profile / PC. Note: If you can't reach this folder, make sure you have the Show hidden folders option checked.

Once you are in the UnistoreDB folder, hold down the CTRL key and press A to select all files. Press the Delete key and confirm the additional prompts. This will delete the contents of this folder.