Pop up asking for read only options when trying to edit a document from a share on Windows 7 client.

We have Windows 7 clients trying to open a .rtf file in Word. The file is in a shared folder on Windows 2008 R2 server.
When the file opens in Word a File in Use window pops up that says the file is locked for editing by 'another user'
Do you want to:
Open a Read Only copy
Create a local copy and merge your changes later
Receive a notification when the original copy is available

On the Server side I have checked the open files and there are no other instances of that file open. I have checked the folder hidden files and there are no leftover lock files from previous sessions.

On the Win 7 Client side I have made changes to Windows Explorer that include removing the preview pane, Organize, Layout, details option as well as Folder Options, view tab, uncheck option for Show pop-up description for folder and desktop items.

I can open the file with no pop up on a Windows 10 client machine.
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William FulksSystems Analyst & WebmasterCommented:
Make sure all your Windows 7 clients are updated. I remember this being an old bug that had something to do with preview mode in Explorer, but I thought it was fixed. If it's possible, try restarting all your Win7 clients and I bet that'll make the message go away.

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RaneeshIT SupportCommented:
open an office program, let's take word itself.
•Click File > Options.
•Click Trust Center > Trust Center Settings > File Block Settings. First try to clear all the boxes and then only enable rtf and give a try.
MohonkAuthor Commented:
I thought we were up to date with updates. I guess we weren't after manually running them on the problem computers. Thank you for your guidance.
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