Download Windows6.1-kb958-488-v6001-x64.msu -
I strongly advise against downloading Windows6.1-kb958-488-v6001-x64.msu. However, if you are a security researcher or a technically advanced user working in a controlled virtual machine, follow these steps:
Rename the .msu to .cab or use:
expand -F:* Windows6.1-kb958-488-v6001-x64.msu output_folder
Examine extracted files (.xml, .dll, .exe, .psf) for suspicious executables.
After thorough analysis, Windows6.1-kb958-488-v6001-x64.msu is not a legitimate Microsoft update. It may be:
Recommendation: Delete any copy of this file you encounter. Do not run it, even in a sandbox, unless you are a professional malware analyst. For genuine Windows 6.1 (Windows 7) updates, use the Microsoft Update Catalog or the official Windows Update service (extended support may require ESU licenses).
sigcheck.exe -a Windows6.1-kb958-488-v6001-x64.msu
(Use Sysinternals Sigcheck.) A valid Microsoft file will show “Microsoft Corporation” and “Verified.”
| Scenario | Verdict | |----------|---------| | You found this file pre-downloaded on an old recovery disk | Examine the digital signature before running. | | You are prompted to download it from a pop-up or email | Likely malware – run a full antivirus scan. | | You need an update for Windows 7 x64 | Ignore this filename. Search for the actual KB needed via official channels. |
Bottom line: Windows6.1-kb958-488-v6001-x64.msu does not match any known, legitimate Microsoft update. Treat it with extreme caution. When dealing with legacy operating systems, always prioritize security over convenience.
Last updated: 2025 — Information applies to Windows 7, Windows Server 2008 R2, and related embedded versions.
The file Windows6.1-KB958488-v6001-x64.msu is a specific update package for the .NET Framework 3.5.1 on Windows 7 or Windows Server 2008 R2 (both identified by version "6.1"). Where to Download Download Windows6.1-kb958-488-v6001-x64.msu
To ensure security, it is best to obtain Windows updates directly from official sources:
Microsoft Update Catalog: This is the most reliable repository. You can search for "KB958488" on the Microsoft Update Catalog to find the correct version for your architecture.
Windows Update: Most systems will download this automatically. You can check for it by going to Control Panel > System and Security > Windows Update. How to Install
Once you have the .msu file, follow these steps to install it:
Double-Click: The simplest method is to double-click the file, which launches the Windows Update Standalone Installer (Wusa.exe).
Command Prompt (Manual): If double-clicking fails, open a Command Prompt as an Administrator and run:wusa.exe C:\path\to\Windows6.1-KB958488-v6001-x64.msu.
Restart: A system restart is typically required to finalize the installation. Troubleshooting Common Issues
If the installation fails with an error (e.g., 0x80070643 or 0xC8000222), try these solutions:
Run the Troubleshooter: Use the Windows Update Troubleshooter to automatically fix common update services. I strongly advise against downloading Windows6
System Update Readiness Tool: Download and run the CheckSUR tool (also known as the Deployment Image Servicing and Management - DISM tool on newer versions) to repair corrupted system files.
Clean Boot: Temporarily disable third-party antivirus or startup programs by performing a Clean Boot to prevent software conflicts during installation.
Are you getting a specific error code when you try to run the installer? KB4489885 - Microsoft Update Catalog
The file Windows6.1-KB958488-v6001-x64.msu is a Microsoft Update Standalone Package specifically designed for 64-bit versions of Windows 7 and Windows Server 2008 R2. This update is fundamentally linked to the .NET Framework—specifically versions 3.5.1 and 4.0—and is often triggered during the installation of software that relies on these environments. Purpose and Functionality
The "6.1" in the filename refers to the Windows NT version for Windows 7. The KB958488 update serves as a critical component for the .NET Framework 3.5.1, which is often pre-installed as a feature in Windows 7 but requires specific updates to remain compatible with newer applications. It is frequently encountered when users attempt to install .NET Framework 4, as the installer may attempt to call this specific MSU file to update existing framework components before proceeding. Common Installation Issues
Users often seek this download because of installation failures. Frequent errors include:
Error 0xc8000222: This is a common failure code during .NET Framework installation, often resolved by stopping the Windows Update service and clearing the SoftwareDistribution folder.
Missing File Errors: Some software installers expect the MSU to be present in a temporary directory; if it's missing or corrupt, the entire installation may fail. Troubleshooting and Recovery
If you are facing errors related to this file, the following steps are standard practice: Examine extracted files (
System Update Readiness Tool: Running the System Update Readiness Tool (CheckSUR) can automatically fix many MSU-related corruption issues.
SFC Scan: Using the sfc /scannow command in an elevated Command Prompt can repair missing or corrupt system files.
Direct Download: While third-party sites like ManageEngine host these patches for IT management, it is always safest to check the Microsoft Update Catalog for the official, digitally signed version.
Не устанавливается .NET Framework 4 - Microsoft Q&A
After checking official Microsoft records and update catalogs, there is no legitimate Microsoft update with the exact string kb958-488. Official KB numbers contain a hyphen followed by a number (e.g., KB958488), but kb958-488 with the extra hyphen and the version string v6001 is highly suspicious.
Here is a detailed, educational article that explains the situation, guides safe downloading practices, and warns against potentially dangerous files.
Do not download or run this file unless you have verified its origin through trusted channels.
| If you see it… | Action | |----------------|--------| | On an official Microsoft, Dell, HP, or Lenovo support page | Safe – but verify the page is authentic (https://catalog.update.microsoft.com) | | On a forum, file-sharing site, or torrent | Do not run – delete immediately | | On a legacy internal corporate server | Check digital signature: Right-click → Properties → Digital Signatures. Should show “Microsoft Windows” |
For scripted deployments, the following command syntax is standard:
wusa.exe Windows6.1-KB958488-v6001-x64.msu /quiet /norestart
Given the inconsistencies, this file might be:
