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Microsoft warns of CPU spikes when typing in classic Outlook

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<https://www.bleepingcomputer.com/news/microsoft/microsoft-warns-of-cpu-spikes-when-typing-in-classic-outlook/>

Seriously, how do you even rationalize this crap?

Microsoft warned Windows users of increased CPU usage when typing while 
using recent versions of the classic Outlook email client.

The company acknowledged this issue following a wave of user reports on 
social media and various online platforms since early November, 
including Microsoft's community website. Those affected reported that 
disabling all spell-check options and add-ins did not resolve the CPU 
usage issues.

In a new support document published this week, Microsoft now revealed 
that this known issue can impact those in the Current Channel, Monthly 
Enterprise Channel, or Insider channels updated to Outlook Version 2406 
Build 17726.20126 and later.

"When you write an email in classic Outlook for Windows, you may notice 
the CPU spikes up to 30 to 50% at some times and increases the power 
consumption. You can observe this if Task Manager is open while you 
type," the company said.

While Redmond's engineers investigate, the company advises affected 
Outlook users to switch to the Semi-Annual Channel, unaffected by these 
CPU spikes, until a solution is available.

To do that, one of the options is to add a specific key to the Windows 
Registry by going through the following steps:

Open a Command prompt window (ensure 'Run as administrator' was selected).

Paste the command below and press Enter:
reg add HKLM\Software\Policies\Microsoft\office\16.0\common\officeupdate 
/v updatebranch /t REG_SZ /d SemiAnnual

After you add the registry key, select File > Office Account > Update 
Options > Update Now to initiate the switch to the Semi-Annual Channel.

IT admins can also switch channels for devices in their organizations 
using Group Policies, the Office Deployment Tool, Microsoft 
Configuration Manager, Intune, the Microsoft 365 Apps admin center, or 
the Microsoft 365 admin center.

Last week, Microsoft also released emergency Office 2016 updates to fix 
crashes in Word, Excel, and Outlook after installing the April 2025 
security updates.

In recent months, the company also addressed a slew of other Microsoft 
365 and Office issues, including a widespread licensing issue blocking 
access to Microsoft 365 services for some customers with Family 
subscriptions and a bug triggering Outlook crashes when clicking a 
button that should've helped users switch back to classic Outlook.

Previously, it fixed a known issue that broke Outlook email 
drag-and-drop after installing recent updates on Windows 24H2 systems 
and another bug that caused Outlook to crash when writing, replying to, 
or forwarding emails.
-- 
God be with you,

CrudeSausage
John 14:6

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Microsoft warns of CPU spikes when typing in classic Outlook CrudeSausage <crude@sausa.ge> - 2025-04-15 10:09 -0400
  Re: Microsoft warns of CPU spikes when typing in classic Outlook Paul <nospam@needed.invalid> - 2025-04-15 23:03 -0400

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