Keith, thank you for all the information. Unfortunately, it does not solve the issue on my PC. I tried several times, of course after having made a registry backup, after having deleted everything in Quick Access. When I try to pin a folder to Quick Access
I invariably get an error message "the parameter is incorrect".
I found that the long string value {-----) has 8 hits in my saved registry. I list them below, the first one comes after searching keys for "Bags" according to your instruction. The "Streams" search hits a key without "Default" subkey. It has three subkeys,
0, 1 and Desktop. Subkeys 0 and 1 have values ViewView2.
I abbreviated the keys below, hope it is clear enough.
HK= HKEY, HKCU= HKEY_Current_User, HKLM= HKEY_Local_Machine, LS=Local Settings, SW=Software, MS=Microsoft, Win= Windows, CV=Current_Version, Cl=Classes
1. HK_Classes_Root\LS\SW\MS\Win\Shell\Bags\4792\ComDlg\{.......}
2. HK_Classes_Root\LS\SW\MS\Win\Shell\Bags\4792\Shell\{.......}
3. HKCU\SW\Classes\LS\SW\MS\Win\Shell\Bags\4792\Shell\{.......}
4. HKCU\SW\Classes\LS\SW\MS\Win\Shell\Bags\4792\ComDlg\{.......}
5. HKLM\SW\MS\Win\CV\Explorer\FolderTypes\{.......}
6. HKLM\SW\Wow6432Node\MS\Win\CV\Explorer\FolderTypes\{.......}
7. HK_Users\S-1-5-21-315870.....-1000\SW\Cl\LS\SW\MS\Win\Shell\Bags\4792\Shell\{.......}
8. HK_Users\S-1-5-21-315870.....-1000_Classes\LS\SW\MS\Win\Shell\Bags\4729\Shell\{.......}
I only deleted the numbered key ....4792\ of the second hit, with the Shell child. It does get rid of ComDlg child as well of course. I wonder if you have any ideas why this deletion does not work on my machine.
Best regards, Albert