Outlook for Windows users are facing high CPU usage issues while composing emails, particularly in versions 2406 and above, with spikes of 30 to 50 percent observed. Microsoft has recognized the problem and is set to roll out a solution in phases starting May 2025, targeting users in various channels, including Beta and Current Channel Preview. This issue has also affected the Semi Annual Channel. Users are advised against reverting to earlier versions due to potential security vulnerabilities that may arise.
Users of the classic version of Outlook for Windows may experience high CPU usage when writing emails, particularly in version 2406 and above.
Microsoft has developed a solution for the high CPU usage issue, which will be rolled out in phases starting in May 2025 for various channel users.
The issue also affects users in the Semi Annual Channel, highlighting the widespread nature of this CPU spike problem across multiple Outlook versions.
While users can revert to version 2405 as a temporary fix, it is not recommended due to missing security updates that could pose risks.
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