I installed 'shexview_setup.exe' (ShellExView v1.90) and disabled the following;
Extension name Company Type
1. Botkind Sync Shell Extension not given context menu
2. iTunes Apple Inc. System
3. RealNetworks Download and Record Real Downloader Browser Helper
4. RealOne Player Context Menu Class Real Networks, Inc. Context Menu
5. Real Search Real Networks, Inc. Search Handler
6. Shell Converter Class Online Media Technologies Context Menu
7. WinOptimizerContextHandler TODO: <Company name> Context Menu
8. Microsoft XPS Rich Preview Handler not provided Preview Handler
see attached file - 'disabled shell ext. - all'
the remaining shell extensions are labeled as 'Microsoft Corporation, Adobe Systems, Inc., Apple Inc., Advanced Micro Devices, Inc., Dropbox, Inc., Google, NVIDIA Corp., Adobe Systems., Alexander Roshal (WinRAR), WinZip Computing, which I did NOT disable.
restarted windows explorer - issue remains unresolved