Outlook Signature, Stationary and Fonts Pane not Opening Up - How to Fix

Fixing the Dreaded Outlook 2013 / 2016 Signature Pane and Stationary Pane Error

On Windows 7, 64bit with Office 2013, 64 bit, you also get event 27 in your Application event log "Outlook Error" with no real details, and the Outlook signature pane does not work anymore, plus stationary and fonts will not open up anymore. It is caused by a missing registry key called LocalServer32 and its associated REG_SZ keys.  Once you add the missing registry keys, you have to reboot your computer to see it working again.

For 32-bit installation:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{0006F03A-0000-0000-C000-000000000046}\LocalServer32

For 64-bit installation

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0006F03A-0000-0000-C000-000000000046}\LocalServer32

Edit the registry and add the LocalServer32 and Default keys containing the path to Outlook.exe.. you may just need to add the localserver32, here's the whole thing that you can import. (64bit)

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0006F03A-0000-0000-C000-000000000046}]

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0006F03A-0000-0000-C000-000000000046}\InprocServer32]
"Assembly"="Microsoft.Office.Interop.Outlook, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71E9BCE111E9429C"
"Class"="Microsoft.Office.Interop.Outlook.ApplicationClass"
"RuntimeVersion"="v2.0.50727"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0006F03A-0000-0000-C000-000000000046}\InprocServer32\15.0.0.0]
"Assembly"="Microsoft.Office.Interop.Outlook, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71E9BCE111E9429C"
"Class"="Microsoft.Office.Interop.Outlook.ApplicationClass"
"RuntimeVersion"="v2.0.50727"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0006F03A-0000-0000-C000-000000000046}\LocalServer32]
"LocalServer32"="C:\\Program Files\\Microsoft Office\\Office15\\outlook.exe"
@="C:\\Program Files\\Microsoft Office\\Office15\\outlook.exe"

like this

use the regedit program to add LocalServer