disruptions Archives

Winsage

October 20, 2026

Microsoft Confirms October Windows Updates Can Break Exchange Server Email Services

Microsoft has acknowledged that the Windows Server security updates released on October 13, 2026, may disrupt Exchange Server email services, affecting on-premises systems running Exchange Server 2016, 2019, and the Subscription Edition. The disruptions can include blocked webmail access and undelivered messages. Microsoft has identified four specific Windows updates linked to these issues: KB5126646 for Windows Server 2025, KB5126655 for Windows Server 2022, KB5126651 for Windows Server 2019, and KB5126868 for Windows Server 2016. Symptoms may include inability to log into Outlook on the web, messages stuck in the Outbox, increased mail queues, and failed mailbox access. A critical error to monitor is MapiExceptionMdbOffline, and affected systems may log Event ID 1006. The October updates introduced a default limit of 512 simultaneous Endpoint Lookup calls, which can be exceeded under heavy Exchange workloads. Microsoft has provided a registry workaround to increase this limit and suggests monitoring for recurring failures. The disruption coincides with the end of the final paid update period for Exchange 2016 and 2019, with future updates limited to the Subscription Edition.

Winsage

October 19, 2026

Latest Windows Updates Introduce Exchange Server Issues

Organizations using on-premises Microsoft Exchange Server are experiencing stability issues after the October 2026 Windows Server updates, which Microsoft has confirmed can lead to unreliable Exchange services, especially in environments with heavier workloads. Administrators have reported problems such as connectivity failures with Outlook on the web, disruptions in mail flow, and complications with database availability groups (DAG), all emerging post-update. This bug affects Exchange Servers on Windows Server versions 2016, 2019, 2022, and 2025. Microsoft has identified that the issue is related to limitations in Endpoint Mapper requests and has recommended a registry-based mitigation to improve capacity and reduce service degradation. The default limit of 512 simultaneous Endpoint Lookup calls may be insufficient under heavy load. Microsoft is investigating the issue and will provide further information. Organizations are advised to maintain critical security updates while implementing additional mitigation measures and closely monitoring affected systems until a long-term solution is found.

AppWizard

October 18, 2026

Should you limit your FPS in games? Here’s when it makes sense

Capping in-game frame rates (fps) can enhance GPU performance, reduce screen tearing, and lower GPU load, leading to quieter fan operation and decreased power consumption. It is generally advisable to cap frame rates to maintain stable performance and minimize screen tearing, especially when using a Variable Refresh Rate (VRR) monitor. Setting a frame rate cap prevents in-game action from exceeding the monitor's refresh rate, which can reduce latency. Screen tearing occurs when a new frame is sent to the monitor before the previous one is fully displayed, causing visual disruptions. To cap frame rates, users can utilize built-in fps limiters in games, NVIDIA Control Panel for NVIDIA users, AMD Adrenalin for AMD users, or third-party software like Guru3D RTSS RivaTuner. The recommended cap is typically three or four frames below the display's maximum refresh rate. V-Sync synchronizes the game's frame rate with the monitor's refresh rate to eliminate screen tearing but introduces input lag, which varies by refresh rate. Fast V-Sync is an alternative that reduces lag while maintaining a tear-free experience, though it may not be compatible with all games.

Winsage

October 17, 2026

Microsoft Overhauls Windows 11 Core Apps and Memory Use in Bid to Win Back Users

Microsoft is overhauling Windows 11 six years after its launch, with significant updates currently available to Windows Insiders and a broader rollout expected later this year. Key enhancements include the reintroduction of taskbar repositioning, a complete redesign of the Search and Photos applications using WinUI3, improved memory management allowing up to 2GB more active data in RAM, and performance improvements of up to 20% in response times for certain tasks. Windows Hello and Bluetooth pairing have been optimized for speed, and the AI assistant Copilot has been redesigned to be less intrusive. Starting in November, new Windows 11 PCs will come bundled with classic and contemporary games. The updates aim to address user frustrations and improve the overall experience, particularly for those with lower-end hardware.

Winsage

October 17, 2026

Microsoft Overhauls Windows 11 Core Apps and Memory Use in Bid to Win Back Users

Microsoft is overhauling Windows 11 six years after its launch, with updates currently available to Windows Insiders and set for public release later this year. Key changes include the ability to reposition the taskbar, a complete redesign of the Search and Photos applications using WinUI3, and enhancements in memory management that allow for more active data in RAM. The revamped Search feature includes direct controls and document previews, while Photos now offers semantic search and improved editing tools. Memory management improvements will benefit lower-end hardware by conserving memory and improving response times. Additional refinements include optimized sign-in processes, faster Bluetooth pairing, and a redesigned AI assistant, Copilot. Starting in November, new Windows 11 PC purchases will come with a selection of games. The updates aim to address user concerns and improve the overall experience of the operating system.

Winsage

October 17, 2026

Windows/Exchange Server October 2026 issue: Analysis and Workarounds

On October 13, 2026, Microsoft released security updates for Windows Server that unintentionally affected Microsoft Exchange Server, causing significant disruptions approximately 24 hours after installation. Users reported issues such as database services failing, resulting in unresponsive email and Outlook Web Access access. Microsoft acknowledged the problem and is investigating it. The updates targeted supported Windows Server and Microsoft Exchange versions 2016, 2019, and SE. By October 15, reports of severe issues, including the inability to connect to the server and halted email delivery, emerged. The error message associated with the disruption is "MapiExceptionMdbOffline: Unable to make connection to the server. (hr=0x80004005, ec=1142)." Despite these issues, the Exchange Admin Center still showed databases as connected and mounted. Unofficial workarounds, including a registry edit and a PowerShell script, have been suggested to mitigate the problems.

Winsage

October 15, 2026

Expert tips to speed up your Windows PC

A fast PC enhances productivity by allowing users to run complex software and multitask efficiently. The latest version of Windows, Windows 11 2024 Update Version 24H2, was launched in October 2024 and offers improved speed and usability compared to previous versions. To optimize a Windows PC's performance, users can take several steps: - Delete old files to free up space. - Remove unwanted startup programs through the Windows Settings app or Task Manager. - Update drivers via Device Manager to ensure optimal performance. - Pause OneDrive syncing to reduce RAM usage. - Use ReadyBoost with an external USB drive to increase memory storage. - Install antivirus software to detect and eliminate viruses. - Upgrade RAM for better performance under heavy usage. - Change power mode to "Best Performance" in settings. - Adjust Windows appearance by disabling visual effects. - Turn off unwanted notifications to minimize disruptions. - Uninstall unnecessary apps to free up resources. - Enable Game Mode for optimized gaming performance. - Restart the PC regularly to clear RAM and refresh resources. - Restore the PC to a previous setting if performance issues persist.

Winsage

October 14, 2026

Microsoft admits a Windows 11 bug is causing stutter in games, and it’s not your mouse or drivers’ fault

Microsoft released the October 2026 Patch Tuesday update (KB5127648) for Windows 11, which fixes a mouse input stuttering bug affecting certain games. This issue was acknowledged in the release notes, stating that the update resolves the stuttering problem. The fix was not included in the optional preview released on September 22. While specific causes and affected games were not disclosed, anecdotal evidence suggests the problem originated from Windows itself. Users reported erratic mouse behavior in games like Star Wars: The Old Republic and Final Fantasy XIV, with persistent issues even after trying various fixes. The update brings Windows 11 versions to Build 26300.9711 for 26H2, Build 26200.9711 for 25H2, and Build 26100.9711 for 24H2, marking the final release for Windows 11 24H2 Home and Pro. An offline installer is available for those having trouble with Windows Update. If stuttering continues, users are advised to check for outdated drivers or other potential issues.

AppWizard

October 12, 2026

OpenAI’s own advice during its October 9 Android outage: use ChatGPT on the web

On the evening of October 9, users attempting to access ChatGPT on Android devices encountered the message "This content is unavailable in this version of the app" due to an issue from OpenAI. The problem began at 21:00:39Z and lasted for three hours and 26 minutes, concluding at 00:26:44Z on October 10. OpenAI advised users to switch to the web version while they worked on a fix for older app versions. A second major incident occurred 48 minutes later, locking workspace administrators out of plugin settings from 21:48:34Z to 23:26:59Z on October 9, totaling one hour and 38 minutes. Both incidents overlapped entirely, with the Android issue persisting for an additional hour after the admin issue was resolved. As of 21:42 UTC on October 10, a third minor incident regarding "Delayed Costs data in the Compliance API" remained unresolved, having started at 17:23:18Z on October 9. OpenAI reported that some customers might experience incomplete Costs data while the backlog was addressed, with the catch-up process expected to continue through October 11. ChatGPT usage and API Platform requests were unaffected, and the overall status was designated as "Partial System Degradation." Additionally, a more significant outage occurred on September 29, lasting five hours and 22 minutes and affecting 30 components, which was more extensive than the incidents on October 9. Neither of the major incidents on October 9 impacted the API.

Tech Optimizer

October 10, 2026

How and why we built Managed PostgreSQL for AI workloads

The Nebius Managed PostgreSQL team developed a solution for AI workloads using CloudNativePG and Kubernetes, resulting in improved backup and restore times by transitioning from Barman to WAL-G, reducing a 1.5 TB backup duration from over a day to two hours. Since its launch in 2025, the service supports hundreds of production clusters and manages tens of tebibytes of data. Key features include high availability, point-in-time recovery, automated failover, compressed and encrypted backups, rapid restoration, connection pooling, and strict synchronous replication for zero data loss. Kubernetes and CloudNativePG were chosen for their advantages, including out-of-the-box features and open-source distribution. Each cloud project has a separate MK8s cluster for customer isolation and security. Persistent data is stored on fault-tolerant SSD drives, enabling swift instance migration during failures. Regular physical backups are archived, allowing restoration within a seven-day window with a single click. The transition from Barman to WAL-G addressed slow backup and restoration times and resource control limitations. With WAL-G, backups and restorations for a 1.5 TB cluster improved to two hours and one hour, respectively. PgBouncer was implemented to manage database connections effectively, reducing connection storms during peak AI workload traffic. Two vector search extensions, pgvector and pgvectorscale, are available to cater to different memory and dataset needs. Benchmarking showed that Nebius performs competitively with AWS at a lower cost. The infrastructure integrates cloud engineering principles with specialized expertise to meet AI workload demands.