Outlool will not open

On starting my PC today Outlook 2010 will not open and a message is displayed saying I do not have  permission to access the file Outlook.pst.

Everything was fine when I shut down my system yesterday and I had no message on startup today that windows updates were being installed.

Windows 10 professional
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Sajid Shaik MSr. System AdminCommented:

1) go tu run    tyepe  outlook /safe   (it'll open in safe mode ) after complete open check... whether its woking fine or not..if yes close it and reopen in normal mode.

2) go to outlook installation path there is a tool u'll find repair pst ... use that too and repair the PST file it may fix.

all the best

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TomPreenAuthor Commented:
OK but my greater concern is what changed on startup in addition when closing SQL Server Management Studio I get a message that my settings cannot be updated.
Sajid Shaik MSr. System AdminCommented:
if you wnat to check what changed... startupmenu - settings - windows update -view installed updates- then check the recent installed updates double ckicl it'll show the details about that update.

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TomPreenAuthor Commented:
The last completed update was 12/09/2018 but there is nothing listed regarding Outlook.

In any event the problem is that read-only permission is set on my c:\users\ folder so how could that have changed from yesterday.
Sajid Shaik MSr. System AdminCommented:
read-only permission is set on my c:\users\ folder is default befavior ..

your issue was on outlook if it resolves then please create a new question regarding the updates issue..

thanks and best regards
TomPreenAuthor Commented:
The permissions message was not shown after I closed Outlook in safe mode and opened normally

Thanks for your help
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