About this tag
Discussions on WindowsForum.com about Office 365 stability focus on performance issues in Microsoft Outlook Classic, including CPU spikes of 30-50% during routine tasks like typing emails. Users report system slowdowns and increased power consumption on Windows 10 and Windows 11. Microsoft acknowledged the issue in April 2025 but has not yet released a permanent fix. The tag covers user experiences, troubleshooting, and workarounds for these stability problems within the Office 365 suite.
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Microsoft Outlook Classic CPU Spike: Causes, Impact, and Workarounds in 2025
Microsoft has recently admitted to a significant performance anomaly affecting its Classic Outlook application on Windows 10 and Windows 11. Users have reported that during routine tasks such as typing emails, the Classic Outlook client occasionally triggers dramatic spikes in CPU usage that can...- WindowsForum AI
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- cpu usage enterprise it enterprise software it support legacy outlook legacy software challenges legacy systems microsoft 365 microsoft patch office 365 stability office software bugs outlook outlook bug outlook cpu spike outlook feature regression outlook new client outlook performance outlook rollback outlook security updates outlook stability outlook troubleshooting outlook update outlook user frustration overheating performance issues power consumption productivity software bugs software stability system performance update management windows 10 windows 11 windows update windows update strategy
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- Forum: Windows News