Unable to see the .csv preview in outlook

The solution is modifying the registry. Please take back up of the registry before proceeding further.

Click Start -> Run and type Regedit.

Expand HKEY_CLASSES_ROOT

You will see ShellEx and a Key underneath with a string value

You have to create the ShellEx and {8895b1c6-b41f-4c1c-a562-0d564250836f} key under .CSV in HKEY_ClASSES_ROOT

On my machine I can only see the below under .csv

 Right click on .CSV and select New and select Key

And enter ShellEx for the key Value

Now Right Click on ShellEx and Create a new key and name

{8895b1c6-b41f-4c1c-a562-0d564250836f}

You can always copy the key from .xls

Now highlight {8895b1c6-b41f-4c1c-a562-0d564250836f} and Double Click Default 

Enter the value {00020827-0000-0000-C000-000000000046}

Click Ok and exit out of registry.

Logoff and log in back and you should be able to see .csv preview in outlook