You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
office 365 stability
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.
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...
cpu usage
enterprise it
enterprise software
it support
legacy outlook
legacy software challenges
legacy systems
microsoft 365
microsoft patch
office365stabilityoffice 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