My outlook is not responding and when I try to login to my gmail account it shows an error,

Question

My outlook is not responding and when I try to login to my gmail account it shows an error,

Alan Duggan 0

my outlook is not responding since yeasterday, when I try to login to my gmail account on the serttings section of my outlook it gives an error

Hornblower409 7,650 Reputation points

2026-03-26T08:33:21.9+00:00

@Alan Duggan

1 -- If the Q&A Assist Answer did not solve your problem:

Click the [No] button on the "Was this answer helpful?" bar under the answer. If there is a [Reject] button visible, click that too. This should signal the forum moderators that you want a human to pick up this question.

2 -- You tagged your question as New Outlook for Windows . But it sounds like you might be using Classic Outlook for Windows. Please see this Microsoft Support article and reply with what version of Outlook for Windows you are using.

https://support.microsoft.com/en-us/office/what-version-of-outlook-do-i-have-b3a9568c-edb5-42b9-9825-d48d82b2257c

2 answers

Your answer

Hornblower409 7,650 Reputation points

2026-03-26T08:33:21.9+00:00

@Alan Duggan

1 -- If the Q&A Assist Answer did not solve your problem:

Click the [No] button on the "Was this answer helpful?" bar under the answer. If there is a [Reject] button visible, click that too. This should signal the forum moderators that you want a human to pick up this question.

2 -- You tagged your question as New Outlook for Windows . But it sounds like you might be using Classic Outlook for Windows. Please see this Microsoft Support article and reply with what version of Outlook for Windows you are using.

https://support.microsoft.com/en-us/office/what-version-of-outlook-do-i-have-b3a9568c-edb5-42b9-9825-d48d82b2257c

Answer 1

Hi Alan Duggan,

Welcome to Microsoft Q&A forum.

Because you’re using new Outlook for Windows, some steps from Q&A Assist (such as Safe Mode or creating a profile via Control Panel) apply to classic Outlook only.

Below are the correct steps for new Outlook, please try them in this order:

1. Fix new Outlook freezing / “Not responding”

Right‑select Start > open Task Manager.
Select Microsoft Outlook > End task to fully close the app.
Reopen new Outlook and check again.
If it still freezes: uninstall and reinstall new Outlook
From the Start menu > select new Outlook for Windows → Uninstall.
Then reinstall it from the Microsoft Store.

2. Add/sign in to Gmail in new Outlook

In Outlook, go to View > Accounts > Your accounts.
Select Add account > enter your Gmail address > Continue.
When the Google sign‑in window appears, sign in and on the permissions screen, select Allow.

If the Gmail account already exists but still errors: Go to Accounts > Your accounts > Manage > Remove the Gmail account > close/reopen Outlook > add the account again.

If you see a Google authentication prompt mentioning “redirect_uri / 400,” try setting Google Chrome as your default browser and then adding the account again.

If Gmail is added but you can’t send/receive, try Remove & Add the Gmail account again.

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Chloe-V 7,270 Reputation points Microsoft External Staff Moderator

2026-03-29T07:47:33.1433333+00:00

Hi Alan Duggan,

May I know if you have got any chance to check my answer? I am glad to help if you have any other questions.

Answer 2

Follow these steps to address both Outlook not responding and the Gmail sign-in error.

Update Outlook to a fixed build

The Gmail sign-in issues in classic Outlook have been fixed in recent builds.
In Outlook, go to File > Office Account > Update Options > Update Now and let Office update to the latest version.
After updating, restart Outlook and try adding the Gmail account again.

Check Gmail IMAP settings Gmail must have IMAP enabled or Outlook will fail to connect.

In a browser, sign in at Gmail.com.
Select Settings (gear icon) > See all settings.
Open the Forwarding and POP/IMAP tab.
Under IMAP access, select Enable IMAP.
Select Save Changes.
Back in Outlook, remove the failing Gmail account from Settings/Accounts, then add it again.

If Outlook freezes or is not responding Outlook freezing when opening files or sending mail can be caused by add-ins, antivirus integration, or a corrupted profile.

Try these in order:

Start Outlook in safe mode to rule out add-ins:
- Close Outlook.
- Press Windows + R, type outlook.exe /safe, press Enter.
- If Outlook works in safe mode, disable add-ins from File > Options > Add-ins.
If antivirus is integrated with Outlook, disable only the Outlook integration or Outlook add-in from the antivirus settings (do not turn off antivirus completely).
Create a new Outlook profile:
1. Open Control Panel > User Accounts > Mail.
2. Select Show Profiles.
3. Select the existing profile and choose Remove (only if mail is stored on the server, not only in local PSTs).
4. Select Add, give the profile a name.
5. Add the email account again and complete setup.

If you see Gmail-specific security errors If Outlook reports errors like the app or browser is not secure, or that IMAP cannot be set up, ensure:

IMAP is enabled in Gmail (step 2 above).
Outlook is updated to a build that includes the Gmail sign-in fix.

If the issue persists after these steps, run the Classic Outlook Advanced Diagnostics troubleshooter from the article on Outlook not responding to automatically check for common causes.

References:

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My outlook is not responding and when I try to login to my gmail account it shows an error,

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