If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.

If a Restart does not help, use Process Explorer to resolve The process cannot access the file because it is being used by another process error.

Microsoft Excel adds Copilot AI to help fill in spreadsheet cells The new ‘COPILOT’ function uses AI to generate summaries, tags, tables, and more based on a group of cells.

Today is Microsoft's August 2025 Patch Tuesday, which includes security updates for 107 flaws, including one publicly disclosed zero-day vulnerability in Windows Kerberos.

Incorrect error messages seem to be a pattern for the company's latest operating system updates.

The Store has removed the persistent toggle and now only lets you pause app updates for 1–5 weeks. If you want to block ...

Microsoft said on Wednesday it has scaled back some Chinese companies' access to its early warning system for cybersecurity vulnerabilities following speculation that Beijing was involved in a ...

Business Microsoft scales back Chinese access to cyber early warning system Microsoft signage is seen at the company's headquarters in Redmond, Washington, US on Jan 18, 2023.

Microsoft has announced the limited public preview of Windows 365 Reserve, a service that provides temporary desktop access to pre-configured cloud PCs for employees whose computers have become ...

The decision adds to the challenges for Nayara Energy, coming soon after technology giant Microsoft Corporation denied the company access to its data services last month over the same issue.

Looking for a traditional yet flexible program to back up your personal files? Windows has a built-in tool that you can take advantage of.