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Why won’t Lexware open after the latest Windows 11 update?
Critical Advisory: Resolving Lexware Startup Failures (Nov/Dec 2025)
Windows updates released in late 2025 currently interfere with Lexware execution. Users report the application initiates but fails to render a window. The Lexware icon appears solely on the taskbar. This error renders the software inaccessible despite the process running in the background.
Identified Conflict Sources
The technical conflict stems from specific cumulative updates rolled out by Microsoft. You will likely encounter this issue if your system installed the following patches:
- Windows 11 (Version 24H2-25H2): Update KB5068861, released November 11, 2025.
- Windows Server 2016: Update KB5071543, released December 9, 2025.
- Windows Server Context: Related updates for Server 2016 (KB5068864) and Server 2019 (KB5068791) also modified system files during this period.
Recommended Solution: Repair Installation
You must resolve this conflict without compromising system security. The most effective remediation is a Lexware Repair Installation. This process refreshes the application binaries and re-registers components to function within the updated Windows environment.
- Navigate to the Windows Control Panel.
- Select “Programs and Features.”
- Locate your Lexware installation.
- Right-click the entry and select “Change” or “Repair.”
- Follow the installer prompts to complete the repair sequence.
This method preserves your database and settings while fixing the startup failure.
Security Warning: Avoid Uninstalling Updates
Some users restore access by uninstalling the problematic Windows updates. We strongly advise against this action. Updates KB5068861 and KB5071543 contain critical security patches that protect your infrastructure from known vulnerabilities. Rolling back these updates exposes your financial data to significant risk. Always prioritize the application repair method over removing operating system defenses.