There is a problem in excel of microsoft 365. while open some file it will take more time than usual.

Question

There is a problem in excel of microsoft 365. while open some file it will take more time than usual.

Sandeep Kumar 25

Sandeep Kumar 25 Reputation points

2026-02-19T08:18:24.01+00:00

Basically, the problem rise in the recent time on many excel file. And all the file does not have too many cells. There may be the problem with microsoft 365.
Alain Cornet 0 Reputation points

2026-02-19T11:51:05.86+00:00

Since today, Big issue with some Excel files that do not open on my pc running on 365 2602 (but oipening on my other pc running on 2601). one is password protected, another is not. excel just strays as blank screen. does not open in safe mode. i did do the quick (not full) repair, no chnage
Daniel-Vo 7,715 Reputation points Microsoft External Staff Moderator

2026-02-20T11:48:36.65+00:00

Hi Alain Cornet,To better support, I recommend you create a new thread so we can discuss clearly about your issue and find the right solution for it.

Answer accepted by question author

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Your answer

Sandeep Kumar 25 Reputation points

2026-02-19T08:18:24.01+00:00

Basically, the problem rise in the recent time on many excel file. And all the file does not have too many cells. There may be the problem with microsoft 365.
Alain Cornet 0 Reputation points

2026-02-19T11:51:05.86+00:00

Since today, Big issue with some Excel files that do not open on my pc running on 365 2602 (but oipening on my other pc running on 2601). one is password protected, another is not. excel just strays as blank screen. does not open in safe mode. i did do the quick (not full) repair, no chnage
Daniel-Vo 7,715 Reputation points Microsoft External Staff Moderator

2026-02-20T11:48:36.65+00:00

Hi Alain Cornet,To better support, I recommend you create a new thread so we can discuss clearly about your issue and find the right solution for it.

Answer 1

Dear Sandeep Kumar,

Thank you for posting your question on the Microsoft Q&A forum.

If some files in Microsoft 365 Excel are taking longer than usual to open, you can check the following:

1/ Check Where the File Is Stored

If the file is stored on:

OneDrive / SharePoint
A network drive
An external device

Try downloading it to your local desktop and open it from there.

If it opens faster locally, the issue is likely network related.

2/ Open Excel in Safe Mode

This helps determine if an add-in is causing the delay.

Press Windows + R
Type: excel /safe
Press Enter
Open the slow file

If it opens normally in Safe Mode, an add-in is likely the cause.

To disable add-ins:

File > Options > Add-ins
At the bottom, choose COM Add-ins > Go
Uncheck all add-ins
Restart Excel normally
Re-enable one by one to identify the problematic one

3/ Check File Size & Content

Although there is not many cells, the file might open slowly due to:

Too many formulas (especially volatile ones like VLOOKUP, XLOOKUP, INDIRECT)
Excessive conditional formatting
Large pivot tables
Many hidden sheets
External data connection

4/ Disable Hardware Graphics Acceleration

Sometimes, display drivers cause delays.

File >Options > Advanced >Scroll to Display
Check: Disable hardware graphics acceleration
Restart Excel

5/ Update Office

Go to File > Account > Update Options > Update Now

6/ Repair Microsoft 365

Repair the Office application

Open Settings from the Start menu and go to Apps > Installed apps.
Locate Microsoft Office, click it, and choose Advanced options or Modify.
Select Repair and follow the on-screen instructions. If the issue persists, repeat the process and choose Reset or Uninstall.

I hope this information helps. If you have any additional questions, please feel free to let me know.

If this response resolves your issue, kindly click Accept Answer and consider upvoting. If you need further clarification, please click Comment.

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