Microsoft says it can quickly repair a identified difficulty inflicting CPU spikes when typing messages in latest variations of its basic Outlook e mail consumer.
Redmond confirmed this bug final week after a wave of person studies on varied on-line platforms since early November, together with Microsoft’s neighborhood web site, with these affected saying that disabling all spell-check choices and add-ins didn’t resolve the CPU utilization points.
As the corporate says in an replace to the unique assist doc, this difficulty now impacts customers within the Semi-Annual Channel who’ve up to date to Outlook Model 2406 Construct 17726.20126 and later.
“While you write an e mail in basic Outlook for Home windows, you might discover the CPU spikes as much as 30 to 50% at some instances and will increase the ability consumption. You may observe this if Process Supervisor is open whilst you sort,” the corporate mentioned.
“We discovered that the difficulty now happens in Semi Annual Channel. Should you urgently have to work across the difficulty the one possibility can be to revert to Model 2405. This isn’t beneficial since there have been safety updates since that model.”
Microsoft says the repair will roll out beginning in early Could to affected customers who set up the next builds:
Outlook customers who must mitigate this difficulty till then can revert to Model 2405 as a short lived workaround utilizing the next steps:
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Find the construct of Model 2405 for the respective channel you’re on from the Replace historical past for Microsoft 365 Apps (listed by date) – Workplace launch notes.
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Open a Command Immediate (Run as Administrator).
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Sort or paste the command under (changing the construct from Step 1), after which press Enter:
"%programfilespercentCommon FilesMicrosoft SharedClickToRunofficec2rclient.exe" /replace person updatetoversion=16.0.17628.20144
In its place methodology, Microsoft additionally supplies the Workplace Deployment Instrument to revert to earlier variations of Workplace.
Just lately, the corporate has additionally launched emergency Workplace 2016 updates to repair crashes in Phrase, Excel, and Outlook brought on by the April 2025 safety updates.
Beforehand, it addressed a number of different Microsoft 365 and Workplace points, together with a bug that triggered Outlook crasheswhen clicking a button that ought to’ve helped customers change again to basic Outlook and a widespread licensing difficulty blocking entry to Microsoft 365 companies for some clients with Household subscriptions.
It additionally resolved a identified difficulty that broke Outlook e mail drag-and-drop after putting in latest updates on Home windows 24H2 methods and a bug inflicting Outlook to crash when writing, replying to, or forwarding emails.
