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Microsoft: Windows 11 Cross Device Service high CPU usage bug is real

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When certain background tasks lead to high CPU usage on a computer, it usually means that the workload is problematic and that is what leads to its misbehavior, and often certain Windows processes or services can be the culprit.

This month, Windows users and insiders noticed something wrong with their systems, and digging into the problem with the handy task manager revealed that the Microsoft Cross Device Service was the potential culprit exhibiting high CPU usage.

These reports were not few and far between as several users confirmed the problem. Here is a Microsoft forum thread started by a user leginmat90 which was upvoted by 46 others at the time of writing. Here’s another one on Windows Eleven forum.

The issue was also reported to the Feedback Hub by a user and at the time of writing, there were 160 others:

Cross-device service suddenly uses an unexpected amount of CPU in the latest Windows 11 Insider builds (starting early June 2024)

Microsoft engineer Jennifer G responded to this issue and confirmed it has He added that the company is reviewing the decision:

Appreciate your patience, we have identified the cause and are working on a fix

The comment was published a week ago even though we still haven’t received the correction.

The Cross Device service, as the name suggests, is what helps a Windows PC connect, sync and share files with devices like phones and actually helps run Phone Link in Windows. The latest Windows 11 Beta Insider build is testing features related to better Phone Link support, and the bug may have slipped through.

The latter brings improved Android file sharing, and another one from February updated the Cross Device experience host that replaced remote capture.

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