The December 2025 cumulative update for versions 24H2 and 25H2 of Windows 11, identified as KB5072033, has caused reports of slowdowns on several computers. Usuários noticed increased consumption of resources such as CPU, RAM and disk right after installation. The issue mainly affects machines with older or limited hardware, causing delays in opening Menu Iniciar, switching between windows, and using Explorador from Arquivos.
Microsoft included a change to the AppX Deployment Service (AppXSVC) service, responsible for installing and updating Microsoft Store applications. Antes of the update, the service operated in Manual mode (activated on demand). Agora, it starts automatically during system boot and remains active in the background. Essa change aims to improve reliability in specific scenarios, as documented by the company.
AppXSVC service change and performance impacts
AppXSVC manages AppX and MSIX packages, including built-in tools like Calculadora and Fotos. With automatic startup, the service performs verification and update tasks at the beginning of the session. Isso results in resource usage spikes during boot and the first few hours of use.
Reports indicate that computers with 8 GB of RAM or less suffer more from the problem. The service can cause high memory consumption, leading to noticeable slowdowns in the interface. In corporate environments, the change has generated false alerts in monitoring tools due to repeated start-stop cycles.
How to identify and temporarily mitigate the problem
Users can check the service status by accessing Gerenciador of Serviços (services.msc) and searching for AppX Deployment Service. The boot mode should appear as Automático after installing KB5072033. Para to reduce the impact, it is possible to change to Manual via command line with the command “sc config AppXSVC start= demand”, followed by reboot.
Microsoft warns that disabling or modifying the service may prevent updates to Store applications. Recomenda-avoid permanent changes until an official correction. The company did not issue a statement acknowledging the problem as a widespread bug, but documented the change as intentional.
User reports and hardware variations
On forums and technical communities, several reports emerged days after the update was released. Computadores with HDDs are slower due to constant access to the disk. Sistemas with NVMe SSDs suffer less, but still experience interface lag on low RAM configurations.
In server environments with Windows Server 2025, the change caused repeated service start/stop cycles. Isso generated noise in monitoring systems and affected operational stability. Administradores from IT applied manual adjustments to restore previous behavior.
Microsoft recommendations and correction prospects
Microsoft explains that the change in AppXSVC seeks greater reliability in isolated scenarios, without detailing which ones. Affected Usuários can temporarily pause updates via Configurações > Windows Update to prevent automatic installation.
The company advises monitoring resource usage and restarting the device if necessary. Não is officially fixed, but future updates may adjust the service’s behavior. Enquanto Therefore, users with limited hardware should evaluate the impact and consider workarounds.
- Check resource usage on Gerenciador of Tarefas after boot.
- Avoid completely disabling AppXSVC to avoid compromising Store.
- Monitor updates from Microsoft for possible service adjustments.
- In managed environments, apply group policies to control the service.
December update includes other improvements
In addition to the change in AppXSVC, KB5072033 brought security fixes and optimizations to the system. Usuários reported improvements in overall stability, but the performance impact overshadowed these benefits on older machines.
The update is part of the monthly security and quality cycle. Não there was an unsecured preview update in December due to holidays. Microsoft plans to continue monthly corrections in 2026.