Microsoft published a list of the best productivity apps in Windows. Copilot is number one. File Explorer is number eight.
If you use Windows for work every day, you can probably already see the problem with that ranking.
File Explorer is how your team finds the contract, opens the quote, drops the invoice into the right folder, and moves on with their day. Copilot is helpful when you need to summarize a long email or turn a pile of notes into a checklist. They are not in the same category, and pretending they are is a marketing decision, not a productivity one.
But the ranking is not the interesting question. The interesting question is what happens when you actually turn Copilot loose inside your business.
What Microsoft boasted…err…published
In February 2026, Microsoft posted a list titled “Best productivity apps in Windows for getting more done.” The order is Copilot, Microsoft To Do, Windows Calendar, OneNote, Snipping Tool, the Clock app with focus sessions, Sticky Notes, File Explorer, and productivity features in Edge.
Windows Latest covered it the same week and called the ranking hard to take seriously for anyone who uses Windows every day. They were not wrong.
This is a marketing campaign tied to the larger push around AI PCs. Microsoft wants Copilot to be seen as the future of productivity, so Copilot goes at the top. That is a sales position, not a survey of how people work.
Where Copilot is genuinely useful
Used in the right places, Copilot does save time.
Summarizing a long email thread before a meeting. Pulling action items out of a messy document. Drafting a first version of a message you would otherwise stare at for ten minutes. Turning rough notes into a clean checklist. These are real wins for the people on your team who do a lot of writing, reading, or planning.
If your sales lead spends an hour a day on email triage, Copilot can cut that down. If your operations manager writes the same kind of memo over and over, Copilot can draft the next one. The value is concentrated in specific roles, not spread evenly across your staff.
Which Copilot are we talking about?
Before going further, this distinction matters. “Copilot” is not one product.
The free Copilot button in Windows is a general AI assistant. It can help you draft, summarize content you paste in, or answer questions. It does not have built-in access to your company’s files, emails, or chats.
Microsoft 365 Copilot is the paid add-on that does. It plugs into your Microsoft 365 tenant and can work across SharePoint, OneDrive, Outlook, Teams, and the rest of your business data. That is the version Microsoft is selling hardest to businesses, and understanding your Microsoft 365 license is the right place to start before you do anything else, which includes the security conversation.
If you do not know which one your team is using, find out before you read the next section.
The part nobody puts in the marketing
Microsoft 365 Copilot is not answering from thin air. Inside your business, it works from the files, emails, chats, and meetings the signed-in user has access to.
Think of it as a new assistant on their first day, eager and fast, who has been handed the keys to every drawer the person they report to can open. They are only as well-behaved as your filing system.
If your SharePoint and OneDrive permissions are tidy, that is fine. Most businesses we walk into for the first time are not tidy. They have site permissions that were set up in a rush four years ago, folders shared with “Everyone” because it was easier, old projects nobody cleaned up, and former employees whose accounts were disabled but whose share links still resolve.
Copilot makes the consequences of that mess visible. An employee asks a reasonable question, and Copilot pulls a salary sheet, a draft offer letter, or a confidential client agreement into the answer because the underlying permissions allowed it. The information was always exposed. Now it shows up in a chat window where someone is actually going to read it.
This is not a Copilot bug. It is a data hygiene problem that Copilot finds. The cost of finding it is paid in HR conversations, embarrassed apologies to clients, and in the worst cases, regulatory exposure if you handle health, financial, or legal data.
What an owner should do
Two things, in order.
First, fix the permissions before you scale up Microsoft 365 Copilot use. Audit who has access to what. Clean up shared drives. Tighten the default sharing settings in SharePoint and OneDrive. Lock down the folders that hold contracts, payroll, client records, and anything else you would not hand to a new hire on day one. This is the unglamorous work that pays off whether you adopt Copilot or not.
Second, decide where Copilot actually fits in your team. Not “everyone gets it because Microsoft says it is the top app.” Roles that involve heavy reading, writing, summarizing, or planning are good candidates. Roles that are mostly transactional, where File Explorer and the calendar do the real work, get less value out of it.
Back to the ranking
Whether Copilot is the top productivity app in Windows depends entirely on the work and the business behind it. For a writer or analyst with clean data behind them, maybe. For your bookkeeper opening File Explorer two hundred times a day, no.
The more useful framing is this: Microsoft put Copilot at the top of a list to sell PCs. Your job is to figure out where AI fits in your specific business, and whether your data is in shape for AI to be a help instead of a liability. If you want help with the permissions audit, the license question, or a rollout that does not embarrass you later, get in touch.