Windows does not maintain one universal, complete list of everything you have opened. Different versions and applications expose their own recent items, and privacy settings may affect which entries are shown.
Look in File Explorer
On current versions of Windows 11, open File Explorer and select Home. Its recent-files area may show items opened recently. On Windows 10, check Quick access. What appears depends on your Windows configuration and recent-item settings, so treat it as a handy starting point rather than an archive.
Check the program that opened the file
If you recall whether you used Word, Excel, a photo editor, or another program, open it and look for Recent, Open recent, or a similar command. App-maintained lists can help identify a document even when its folder escapes you.
Search by one detail you recall
Windows Search and File Explorer can search files that still exist. Try part of a name, a project word, a folder, or an extension like .pdf. Search finds matching files; it does not necessarily tell you which result was part of your most recent task.
When you switched between several apps
If checking app by app becomes a scavenger hunt, What Was I Working On? brings supported recent-item signals into a searchable overlay and history window. Press Alt + Space, type any clue you remember, and open a result or its folder.
The app does not crawl your drives, and no activity tool can show sources that Windows or the application does not make available. It is a convenience view—not a complete system audit or file backup.
Make the next search easier
- Give projects distinct folder names.
- Pin frequently used files in the application where you use them.
- Remembering the app name or file extension can narrow a search quickly.
- Review privacy preferences on shared Windows accounts.