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Excel attachments fail to open from mails in Outlook 2019

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Most, not all Excel attachments, fail to open if doble clicked directly on the attachment icon in Outlook 2019 emails.

They pop a window advising there was some issue with the content on the file and offering to recover it on confirmation. If so, it comes back to tell the recovery failed.

Yet one can preview these attachments or save them and open these later.  These fail only if double clicked directly. These attachments, also open normally on other PCs of us bundled with MalwareBytes.

I tried uninstalling and reinstalling Office 2019 with no results.  Then I exited Malwarebytes and the issue disapeared.

I tried repairing, uninstalling and reinstalling Malwarebytes as well by means of your MalwareBytes Support Tool with no result as well.

Please help.

This is an i7 Lenovo Think Center, with 32 Gb RAM, Windows 10 and Office 2019, working fine in every other way.


I get this if I try to open the file directly.png

But I canpreview or save the file and open it later.png

MWB Version.png

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***This is an automated reply***


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Please do the following so that we may take a closer look at your system for any possible infections.

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Thank you

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44 minutes ago, MrBobSanchez said:

Hope you can shed some light.

Any reason you have not updated Windows in 6 years?

It was also a bad idea to do a clean install of Malwarebytes before posting these logs. You have now lost some of the info I was looking for to assist you.

In the following section,


Do you have the following enabled?


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This computer ia an RDP server. It features a patch to allow multiple sessions to be accesed simultaneously by the users.  Some Windows updates disable this patchand it has to be reenabled. Back then the vendor used to somehow configure Windows to prevent it from updating.  We have tried to reenable updates, but haven't been succesful in undoing such configuration.

By the way.  Other users in the same server, myself included, do not experience the Excel attachments issue, currently.  However, one user did started to experience the same thing weeks ago in this same server and I thought, back then, it was related to some corruption on that users session, so I recreated the session on another RDP server and solved it that way.

Now, it is starting again with another user -as I described- and I went after the Microsoft Office first, made an online repair. Then I discovered exiting MWB cleared the issue, and I tried tried repairing Malwarebytes, right form the Remove Programs thing at Control panel.  It poped a windows advicing me to use the Support Tool and this tool prompted uninstalling as the first step. So it wasn't my idea at all, by the way, to do the clean uninstall.

Hope this adds some info.  As you can see in the screenshot; Penetrating Testing is disabled.

Thank you very much for your help.

Penetration Testing Disabled.PNG

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Thank you for your tip.

I asked my computers vendor and he pointed me in the direction of a leading AV software. 

They were kind enough to walk me through the election of the right software, helped me set it up and the issue disappeared.

Guess we will be replacing the remaining MalwareBytes licenses as well and displacing them to back end home computers.


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