SOVLED! Outlook 2016 “System Resources Are Critically Low” How To Fix

Regarding Outlook 2016 “System resources are critically low”, lack of memory is the leading cause and you should free up memory by ending some tasks. Other solutions include creating a new Outlook profile, repairing Outlook, modifying the Windows Registry and so on. Read to the end to get rid of the error and put Outlook to good use.



Like everything else on Windows computers, Outlook could only perform to its full potential if it receives enough resources including memory. Thus, if you come across the “System resources are critically low” error while using Outlook 2016, available memory must be running low. Unless you take action, the error is going to persist.


For your information, to be able to use Outlook, you need an Outlook profile. The profile affects many aspects of Outlook so if the profile acts up, Outlook would go haywire. Therefore, once it comes to Outlook 2016 “System resources are critically low”, you should take profile into account.


While Outlook works well in most of the cases, it’s still an app and apps could get damaged, corrupted, etc. You have a hard time using Outlook 2016 due to the “System resources are critically low” error? Then it’s strongly recommended that you add Outlook to your list of suspects.


All in all, the nature of Outlook means server issues usually disrupt its operation. If there is nothing out of the ordinary on your end, give server some thought.

How To Deal With The Error

End Some Tasks

  • Step 1: Right-click an empty space on the taskbar then pick Task Manager.
  • Step 2: Locate non-essential tasks in Processes tab, select each of them and choose End task.
  • Step 3: See how things turn out.

Note: You should free up some disk space. If available memory is too low, Outlook could swap memory pages to your hard drive which leads to a decline in performance of your PC. Also, it won’t hurt to get the computer more RAM. Nowadays, it’s possible to pick up RAM sticks from local computer stores. Of course, you should make sure the RAM sticks could work on your PC.

Create A New Outlook Profile

You must delete the current profile before adding a new one. There is no need to worry as your email data will remain unchanged.

  • Step 1: Go to Search bar, type Control Panel and press Enter.
  • Step 2: Change View to Small icons then hit Mail.
  • Step 3: Click the existing profile and pick Remove.
  • Step 4: Select Add a new profile, name the profile and choose OK
  • Step 5: Follow onscreen instructions.

Repair Outlook

If you suspect that Outlook is responsible for “System resources are critically low”, you should repair it. To repair Outlook, go through the steps down below:

  • Step 1: Go to the Search bar, type Control Panel and press Enter.
  • Step 2: In the Control Panel, change View by to Small icons then hit Program and features.
  • Step 3: Locate Microsoft Office, right-click it and pick Change.
  • Step 4: Hit repair then follow onscreen instructions.
  • Step 5: After you finish, restart your computer.

Modify The Windows Registry

Note: The Registry is a dedicated part of Windows so it’s widely advised that you exercise caution. All it takes is one mistake and your computer would no longer work.

  • Step 1: Go to Search bar, type Regedit and press Enter to open Registry Editor.
  • Step 2: Click File, pick Export and put the backup in a location of your choosing.
  • Step 3: Navigate to \16.0\Outlook.
  • Step 4: Hit Autodiscover
  • Step 5: Right-click an empty space on the right side, click New, hit DWORD (32-bit) value and name the new value ExcludeHttpsRootDomain. Next, double-click the new value, set Value data as 1 and Base as Hexadecimal. Last but not least, save your changes, close Registry Editor and witness the result.

Contact Customer Support

None of the above work? In that case, you have no choice but to contact customer support of Microsoft and ask for assistance. If the servers run into issues, you could learn when they would go back online.


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