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Richard, Software Engineer
Category: Microsoft
Satisfied Customers: 44749
Experience:  Over 15 year experience resolving Microsoft Office Issues
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I have been using Outlook 2013 year without too much

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I have been using Outlook 2013 for a year without too much trouble this morning it stopped an gave this message C:\Program Files (x86)\Common Files\Microsoft Shared\Office15\mso.dll is either not designed to run on windows or it contains an error.
Thank you for your question, my name is ***** ***** I look forward to assisting you.
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Can you tell me the version of windows you are using please?
Customer: replied 2 years ago.
7 professional
Thank you
Can you close all programs.
Click start, control panel, uninstall a program.
Click on office, click change then repair.
Choose online repair, let this complete and once done, restart the computer and tell me if outlook then opens.
I can also do these steps for you, and have made a request via Additional Services. This is optional, and if you choose to do this, I can, with your permission, remote into your computer while you watch and do all these steps (and deal with any problems that arise during them) for you. Or if you do not choose to take this service, we can continue here. This is no problem at all. Just let me know please.
else Let me know the results please
Customer: replied 2 years ago.
didn't work
Did it complete the repair?
Customer: replied 2 years ago.
yes the repair finished and then restarted but Outlook still brings up same error messages
ok, but did you restart the computer?
Customer: replied 2 years ago.
ThanksClose all programsClick start, type in outlook.exe /safe Press enterDoes outlook then open or same error?
Customer: replied 2 years ago.
same error messages - I agree to you taking over the computer
ok, accept the offer and then I can please.
Richard and other Microsoft Specialists are ready to help you
Thank you
Can you go to
Click on Download for Free
Download and install the program and give me the ID and Password ***** please so I can connect
Do not close the program but leave it open else I will not be able to connect
Thank you
Customer: replied 2 years ago.
teamviewer is open on my computer my ID 120 264 288 password *****
Customer: replied 2 years ago.
what next?
connecting now
It says the password ***** ***** can you double check it please
Customer: replied 2 years ago.
Sorry got two wrong way round 8930
Customer: replied 2 years ago.
I have done everything recommended - still not working
ok, then we will need to do a resintall.
Go to control panel and click on office and click uninstall.
Let this complete then restart the computer.
Install Office again like you did when you first received it and tell me if Outlook then opens please.
Let me know the results please
Customer: replied 2 years ago.
I have no idea now where I downloaded the program from
Customer: replied 2 years ago.
it was about a year ago and yet in programs it seems to have modified last week -not by me...
ok, if they were modified last week, then this may have caused the issue so we can then do a system restore and try to resolve it this way.
Close all programs.
Click start, and type in
system restore
press enter
Follow the onscreen steps and perform a restore using the restore date before this modification occurred and when outlook last worked.
Let it complete and tell me if outlook then functions please.
Customer: replied 2 years ago.
I have to go out - for a while when are you off?
I am off in 2 hours but back here in 12 hours so we can continue then as well, thats no problem.
Customer: replied 2 years ago.
Hi Richard,
I've tried system restore on several dates and it won't restore
Customer: replied 2 years ago.
Outlook still giving the same message
Whats the message you get when the restore fails?
Customer: replied 2 years ago.
Unable to restore to previous point you settings are unchanged or something like that
ok, your going to need to do a reinstall.
To uninstall it go to start, control panel, click on Office and click uninstall
Then restart the computer
Once done, go to and sign in iwth the account you used when purchasing office.
Then download and install it again and it should now function.
Let me know the results please
Customer: replied 2 years ago.
Are you sure I bought 2010 a long time ago and Outlook 2013 more recently
Am I sure of what sorry?
Customer: replied 2 years ago.
If I uninstall Office I will be uninstalling Office 2010 which I want to keep
Or should I just uninstall Outlook 2013?
just uninstall 2013
Customer: replied 2 years ago.
its gone - I can't find the order on the website
It would never dissapear, it is there always.
possibly you used another account? Else then you purchased it from somewhere else.
Try to find the email that confirmed the purchase.
Customer: replied 2 years ago.
Your Order and Billing Information:
Order Number:(###) ###-####
Order Date: 23 November 2014
Customer: replied 2 years ago.
But it says now there was no order
ok sorry but that can mean anything.
You need to obtain it again from the place you purchased it from.
Probably you used a different account.
you best to call microsoft on (0)344(###) ###-####and find out