Solved Outlook classic high memory usage and freezing


SVQxHC

Member
Local time
4:10 AM
Posts
4
OS
Windows 11
Windows 11 Version 24H2 (x64) 26100.4202

Good morning, everyone.

Some users from my company are experiencing issues with Outlook Classic on their laptops. It consumes a significant amount of RAM to the point of completely freezing the entire computer. They don’t need to do anything special, just opening Outlook Classic triggers the issue.

Recently, I tried creating a new .PST data file in one user's laptop, and it seemed to work for a couple weeks, but the problem has returned.

The Office 365 package is fully updated, and the laptop is also up to date. The user has about 20GB of data in their email, while others have more than 50GB without experiencing any issues. When I open Task Manager, WebView2 appears under Outlook Classic, and it is the process consuming resources and freezing the system.

I've been trying to solve this with no luck. Does anyone here know what else I could try? Some users refuse to switch to Outlook New and insist on using Outlook Classic, even though Outlook New works perfectly for them (sadly, I can't fix stubbornness).

Thank you all :)
 
Windows Build/Version
Windows 11 Version 24H2 (x64) 26100.4202

My Computer My Computer

At a glance

Windows 11Intel Core i5-10500 CPU @ 3.10GHz8GB DDR4Intel(R) UHD Graphics 630
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP
CPU
Intel Core i5-10500 CPU @ 3.10GHz
Motherboard
HP 8717
Memory
8GB DDR4
Graphics Card(s)
Intel(R) UHD Graphics 630
Monitor(s) Displays
HP P24h G4 x 2
Hard Drives
WDC SN530 S256G
I have no problem with high memory usage Outlook 2024 i don't know which version you are using, try repairing the installation of Outlook from Control Panel --> Program and features.
 

My Computer My Computer

At a glance

Windows 11AMD Ryzen 7 5700GMicron Technology DDR4-3200 16GBNVIDIA GeForce RTX 3060
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP Pavilion
CPU
AMD Ryzen 7 5700G
Motherboard
Erica6
Memory
Micron Technology DDR4-3200 16GB
Graphics Card(s)
NVIDIA GeForce RTX 3060
Sound Card
Realtek ALC671
Monitor(s) Displays
Samsung SyncMaster U28E590
Screen Resolution
3840 x 2160
Hard Drives
SAMSUNG MZVLQ1T0HALB-000H1
I deleted the user's local profile on the computer and recreated it (windows' profile, not Outlook's profile), after which everything started working properly again. ✅

Reinstalling M365 didn't work.
Repairing M365 didn't work.
 

My Computer My Computer

At a glance

Windows 11Intel Core i5-10500 CPU @ 3.10GHz8GB DDR4Intel(R) UHD Graphics 630
OS
Windows 11
Computer type
PC/Desktop
Manufacturer/Model
HP
CPU
Intel Core i5-10500 CPU @ 3.10GHz
Motherboard
HP 8717
Memory
8GB DDR4
Graphics Card(s)
Intel(R) UHD Graphics 630
Monitor(s) Displays
HP P24h G4 x 2
Hard Drives
WDC SN530 S256G

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