Outlook: Solution for high processor load when writing is coming
Microsoft has announced a solution to the problem with classic Outlook, which causes the CPU load to rise by up to 50 percent.
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Composing emails in Outlook – has apparently been stressing many processors with 30 to 50 percent CPU load since November last year. Microsoft has now updated the confirmation of the problem from last week and announced a solution for the near future.
As Microsoft writes in the associated support article, the developers have already fixed the issues. The issue may occur after updating to version 2406 build 17726.20126+ in the Current channel, Monthly Enterprise channel or the Insider channels for classic Outlook – meaning: All users may be affected. The bug-fixed versions are then version 2505 build 18822.15000 in the beta channel, version 2505 18827.20000 in the update preview channel and then later in the current channel.
Schedule for fixing processor load in Outlook
While the beta channel and the update preview channel are scheduled to be equipped with the fixes in mid-May 2025, end users will then have their turn towards the end of May 2025. The issue concerns the semi-annual channel, Microsoft explains. The developers from Redmond initially recommended switching to this channel as a workaround. According to Microsoft, anyone who urgently needs to solve the problem could go back to version 2405. However, the manufacturer explicitly does not recommend this, as security updates have been released since then.
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However, Microsoft does provide brief instructions on how to do this. If you want to go back to the old version, you should select build 2405 for the release channel used from the list in the update history. This version can then be installed at the administrative command prompt by calling the command "%programfiles%\Common Files\Microsoft Shared\ClickToRun\officec2rclient.exe" /update user updatetoversion=<number from update history> (please omit the angle brackets).
Last week, there were still doubts that Microsoft was interested in a bug fix, as the company wants to push the “new Outlook” to the masses. The company has now shown that it is still providing support for this software.
(dmk)
