To delete your Microsoft account activity history, follow these steps:
- Select the Start button.
- Go to Settings.
- Navigate to Privacy & Security, then select Activity history.
- Under "Clear activity history for this account," click the Clear history button.
This will remove the activity data associated with your Microsoft account on that specific device. Keep in mind that this process might not erase all data Microsoft has collected, especially if you've enabled cloud-based activity syncing or other data collection features. To manage those, you might need to explore the privacy settings within your Microsoft account online.