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October 26.2025

2 Minutes Read

Windows Now Disables File Explorer Previews: Crucial Safety for Business Owners

Windows File Explorer showing file transfer in progress.

Enhancing Security: Windows Takes Protective Measures

With the digital landscape constantly evolving, security vulnerabilities continue to pose challenges for users worldwide. Microsoft has recently taken a critical step in this fight against cyber threats by disabling the preview function in File Explorer for files downloaded from the internet. This is part of their October 2025 security update and is a safeguard against potential credential theft attacks.

A Closer Look at the Risk

Reports have indicated that one of the major risks stems from NTLM hash leakage, which can occur when users preview files that contain HTML tags referencing external paths. This vulnerability could allow malicious individuals to capture sensitive credentials simply by tricking users into previewing a potentially dangerous file. By making these previews unavailable, Microsoft mitigates the risk of users inadvertently exposing sensitive information.

Implications for Business Owners

For small and medium-sized business owners, this move has practical implications. While it may seem like a minor adjustment, the prevention of attacks through compromised file previews can safeguard sensitive data and maintain operational integrity. In a time where data breaches can lead to significant financial and reputational damage, this proactive step is vital.

Practical Steps Moving Forward

Should business owners need to view a file from an untrusted source, Microsoft has provided a straightforward workaround: right-click the file, select 'Properties,' and then click 'Unblock.' However, it is essential for managers and decision-makers to ensure that this process is only done for trusted files. Understanding the risks associated with file downloads can help in making informed decisions regarding cybersecurity.

The Importance of Staying Informed

As technology continues to advance, being aware of security updates and their implications is crucial for safeguarding your business. Staying informed about the evolving digital landscape can empower small and medium-sized businesses to create a robust cybersecurity strategy. By adapting to new vulnerabilities and implementing necessary precautions, companies can enhance their defenses against cyber threats.

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Windows Now Disables File Explorer Previews: Crucial Safety for Business Owners

Enhancing Security: Windows Takes Protective Measures

A Closer Look at the Risk

Implications for Business Owners

Practical Steps Moving Forward

The Importance of Staying Informed

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