This guide will show you the steps to fix the issue of Outlook crashing when opening many emails at once. This personal information manager software system from the Redmond giant beholds a slew of useful features, including the likes of calendaring, task managing, contact managing, note-taking, and journal logging, though it goes without saying that its usage as an email client for business is its USP. With that said, it is currently getting bugged with a rather infuriating issue: users aren’t able to open numerous emails at once.
When users try to open more than 60 emails, Outlook tends to crash straight away. The accompanying error message reads “Out of memory or system resources. Close some windows or programs and try again”. This issue is only affecting the users with the classic Outlook interface in Microsoft 365. Fortunately, there does exist a nifty workaround that should help you address this bug. So without any further ado, let’s check it out.
Fix Outlook crashing when opening many emails [60+]
To rectify this issue, you’ll have to increase the value of the “USERProcessHandleQuota” registry to allow more user values to open at the same time. However, this might prove to be a risky bet so take a registry backup beforehand and proceed ahead with caution [Microsoft has warned that “Increasing the process quota could lead to overall system instability because it enables all processes on the machine to have more user objects open at the same time, placing additional strain on the operating system.”.
- Use the Windows + R shortcut keys to open Run dialog box.
- Then type regedit and hit Enter to open the Registry Editor.
- Now head over to the below location:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows
- Double-click on USERProcessHandleQuota and switch to Decimal view.
- Then increase its value to something higher [but not more than 18,000].
- Now, hit OK to save the changes and the underlying issue will be rectified.
That’s. it. These were the steps to fix the issue of Outlook crashing when opening many emails at once. As far as the official stance on this matter is concerned, the developers are aware of this issue, but they haven’t given out any ETA for the rollout of a fix. As and when that happens, we will update this guide accordingly. In the meantime, the aforementioned workarounds are your best bet.
