Impact if we overwrite vbscript.dll from Windows Server 2008 R2 to Windows Server 2019

Question

Our app is running slower in Windows Server 2019 compared to Windows Server 2008 R2.

This is also reproduceable in Windows 10 Dev Machine.

We tried to replace the vbscript.dll from 2008 R2 to our Dev Machine and we can see a lot of improvements.

Now I'd like to know if there would be any impact we do the same thing to our Windows Server 2019.

If there's any suggestions, I'd like to hear it.

If this won't make any impact of having an old version of DLL in a new OS version, then we will proceed on this change.

Reference: https://stackoverflow.com/questions/52117872/vbscript-slow-under-windows-feature-update-1803%C2%A0 

https://forums.autodesk.com/t5/moldflow-insight-forum/visual-basic-scripts-synergy-api-running-slow-on-windows-10/td-p/8403141

Answer 1

Hello,

Replacing system files, such as vbscript.dll, with versions from older operating systems is generally not recommended. While it may seem to improve performance for a specific application or scenario, it can introduce compatibility issues and instability in the overall system. Here are some important points to consider before proceeding with such a change:

Compatibility Issues: Windows Server 2019 and Windows 10 are built on a newer architecture compared to Windows Server 2008 R2. Replacing a system file from an older version may lead to unexpected behavior, compatibility issues, and system instability.

Security Risks: Using an older version of a system file can expose the system to potential security vulnerabilities that have been addressed in newer versions. Security updates and improvements are often included in newer versions of system files.

System Stability: Replacing system files can cause system instability, leading to crashes, errors, and blue screen issues.

Application Compatibility: While your specific application may run faster with the older vbscript.dll, it is possible that other applications and system components may not function correctly or may experience compatibility issues.

Future Updates: Overwriting system files may cause problems during future system updates and upgrades. Windows updates and feature updates may include changes to system files, and the overwritten file may be replaced with the correct version, potentially causing conflicts.

Instead of replacing system files, consider the following steps to address the performance issues:

Application Optimization: Work with your application's developers or vendor to optimize the application for Windows Server 2019 or Windows 10. They may be able to identify performance bottlenecks and make necessary adjustments.

Performance Monitoring: Use performance monitoring tools to identify specific areas where the application is experiencing slowdowns. This can help pinpoint the root cause of the performance issues.

Windows Updates: Ensure that the Windows Server 2019 and Windows 10 systems have all available updates installed. Windows updates often include performance improvements and bug fixes.

Hardware Upgrades: Consider upgrading hardware components, such as CPU, RAM, or storage, to improve overall system performance.

Compatibility Modes: Some applications may have compatibility modes or settings that can be adjusted to improve performance on newer operating systems. Check if your application has any compatibility options available.

Profiling and Debugging: Utilize profiling and debugging tools to analyze the application's behavior and identify areas where optimizations can be made.

It's crucial to prioritize system stability, security, and compatibility over short-term performance gains. If the performance issues persist, consult with application developers, IT experts, or Microsoft Support to find appropriate solutions for your specific environment.

I used AI provided by ChatGPT to formulate part of this response. I have verified that the information is accurate before sharing it with you.

Hope this resolves your Query !!

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