Outlook | Windows | New Outlook for Windows | For business
Using New Outlook on Windows for professional communication and productivity
Having a similar issue. The repair and reset did not help. Now I cannot open the application.
Unable to attach files using Outlook.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 62%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAB%3C/text%3E%3C/svg%3E)
Andrew Butler
0
Reputation points
When I try to attach any file using the standard Outlook app on the PC, the whole app hangs and I have to cancel. This has developed suddenly, and I have no idea how to resolve it. Rebooting the PC doesn't help. This is the current latest version of Outlook, running on Microsoft 365, on a nearly new Asus Windows 11 computer.
Outlook | Windows | New Outlook for Windows | For business
Locked Question. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
2 answers
Sort by: Most helpful
-
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(275.2, 15%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHA%3C/text%3E%3C/svg%3E)
Holly Arthur 0 Reputation points2026-11-12T20:04:05.2033333+00:00 -
Stefan Blom 357.7K Reputation points MVP Volunteer Moderator2026-11-13T09:59:29.7333333+00:00 Please start your own thread so that your question gets more attention. Use the Ask a question link. Good luck.
The current thread is old and it will be closed.
-
-
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(227.2, 37%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Aetherin 3,930 Reputation points Independent Advisor2026-09-25T15:15:34.5733333+00:00 Hi @Andrew Butler,
To help narrow down the cause, could you please check a couple of things?
- Does it freeze before the file picker opens, or after selecting the file?
- Are you able to attach the same file when using Outlook on the web?
- Does dragging the file directly from File Explorer into the message produce the same result, or does it only happen when using the Attach file button?
In the meantime, as a workaround, you may use Outlook on the web, drag and drop the file into the message, or upload it to OneDrive and send it as a sharing link.
If the web version works normally, the issue may be specific to the local Outlook app. In that case, please try repairing the app: Windows Settings > Apps > Installed apps > Outlook (new) > Advanced options > Repair.
If Repair does not help, try Reset, then sign in again with your account and test attaching a file once more.
Please give these steps a try and provide the results, along with any additional details you can share. I'd be happy to take a closer look and help investigate further.
Thank you for your patience.
-
Aetherin 3,930 Reputation points Independent Advisor
2026-09-27T08:43:43.1233333+00:00 Hi @Andrew Butler,
Have you had a chance to check the replies provided? Any update would be appreciated.