PowerPoint stores temporary files and cached data to improve performance and enable AutoRecovery. Over time, these cached files can consume significant disk space or become corrupted, causing crashes or save errors. This article explains where the PowerPoint cache folder is located on Windows 10 and Windows 11, what types of files it holds, and how to safely delete them without losing your work. You will learn the exact folder paths and the correct method to clear only the safe-to-delete cache.
Key Takeaways: Clearing the PowerPoint Cache on Windows
- %temp% folder (PowerPoint temporary files): Contains AutoRecover drafts and session cache; safe to delete when PowerPoint is closed.
- C:\Users\[username]\AppData\Local\Microsoft\Office\16.0\OfficeFileCache: Holds cached Office file previews and quick-access data; clearing it may slow initial file opening.
- Disk Cleanup tool (Temporary Files category): Automatically removes PowerPoint cache without manual folder navigation.
What the PowerPoint Cache Folder Is and Why It Grows
PowerPoint uses several cache locations on Windows to store temporary data. The primary cache holds AutoRecover drafts of unsaved presentations, thumbnail previews, and fragments of embedded media such as videos and images. This cache helps PowerPoint open recent files quickly and recover your work after a crash.
The cache grows when you work on large presentations with embedded 4K videos, high-resolution images, or complex animations. Each time you save, PowerPoint may create a new temporary copy of the file in the cache folder. Over months of regular use, these leftover files can accumulate to several gigabytes.
A corrupted cache file can cause PowerPoint to freeze when opening a specific presentation or to display “PowerPoint cannot read the file” errors. Clearing the cache resolves these issues without affecting your original .pptx files stored on your hard drive or OneDrive.
Safe Methods to Clear the PowerPoint Cache Folder
Use one of the following three methods to delete the cache. Always close PowerPoint completely before starting any method.
Method 1: Delete Temporary Files via the %temp% Folder
This method removes all PowerPoint temporary files, including AutoRecover drafts and session cache. It is the most thorough approach.
- Open the Run dialog
Press Windows key + R on your keyboard. The Run dialog box appears. - Type the temp folder command
Type %temp% into the Open field and press Enter. File Explorer opens the temporary files folder for your user account. - Filter for PowerPoint files
In the top-right search box, type PowerPoint and press Enter. File Explorer shows only files with “PowerPoint” in their name. - Select and delete the cache files
Press Ctrl + A to select all visible files. Press the Delete key. If a file is in use, skip it by clicking “Skip” in the dialog. These locked files belong to currently open programs and are not cache. - Empty the Recycle Bin
Right-click the Recycle Bin icon on your desktop and select Empty Recycle Bin to permanently free the disk space.
Method 2: Clear the Office File Cache Folder
This cache stores previews and metadata for recently opened Office files. Clearing it may cause the PowerPoint Open dialog to load file thumbnails more slowly for a short period.
- Navigate to the Office cache folder
Open File Explorer and paste the following path into the address bar: C:\Users\[YourUsername]\AppData\Local\Microsoft\Office\16.0\OfficeFileCache. Replace [YourUsername] with your Windows account name. - Select all cached files
Press Ctrl + A to select every file in the folder. Each file has a name like “Cache_XXXXX.odc” and does not contain your original .pptx data. - Delete the files
Press the Delete key. Confirm the deletion if prompted. The folder itself remains; only the cache files are removed.
Method 3: Use the Disk Cleanup Tool
Windows Disk Cleanup can automatically remove PowerPoint temporary files without requiring manual folder navigation.
- Open Disk Cleanup
Press Windows key + S, type Disk Cleanup, and press Enter. Select the drive where Windows is installed (usually C:). - Scan for temporary files
Disk Cleanup calculates how much space you can free. Wait for the calculation to finish. - Select Temporary Files
In the list of files to delete, check the box next to Temporary Files. Do not check any other box unless you understand its effect. - Run the cleanup
Click OK, then click Delete Files to confirm. Disk Cleanup removes all temporary files, including PowerPoint cache.
Issues You May Encounter After Clearing the Cache
Clearing the cache is safe, but you may notice a few temporary changes in how PowerPoint behaves.
PowerPoint Opens Recent Files More Slowly
After deleting the OfficeFileCache folder, PowerPoint must rebuild thumbnail previews for recently opened presentations. This is normal and lasts only until you open each file once. The speed returns to normal within a few sessions.
AutoRecover Drafts Disappear
If you delete the %temp% folder while PowerPoint is closed, any unsaved drafts that were stored as temporary files are permanently removed. To avoid losing work, save all open presentations before clearing the cache. PowerPoint stores the most recent AutoRecover draft in the same folder, so always save first.
“File in Use” Error When Deleting
If you see a “file in use” message while deleting cache files, it means PowerPoint or another Office app is still running. Close all Office programs, then retry the deletion. If the error persists, restart Windows and delete the files immediately after the desktop loads.
Cache Clearing Methods Compared
| Item | %temp% Folder | OfficeFileCache Folder | Disk Cleanup Tool |
|---|---|---|---|
| Files removed | All PowerPoint temporary files including AutoRecover drafts | Office file previews and metadata cache | All temporary files from all apps, including PowerPoint |
| Risk of data loss | Unsaved drafts are deleted | No data loss; previews rebuild | No data loss if you select only Temporary Files |
| Ease of use | Manual: requires Run dialog and file selection | Manual: requires exact folder path | Automatic: built-in Windows tool |
| Best for | Freeing maximum space or fixing corruption | Speeding up file Open dialog thumbnails | Quick routine cleanup without navigation |
You can now safely clear the PowerPoint cache on your Windows machine using the method that fits your needs. For routine maintenance, use the Disk Cleanup tool once a month. If you encounter a specific error like “PowerPoint cannot read the file,” delete the %temp% folder after saving all open presentations. To prevent cache buildup, reduce the number of embedded media files in your presentations by linking to videos instead of embedding them.