contextmenu64.dll - When you right-click on a file in Explorer, you don't get any context menu.

Google Drive context menu handler interferes with the Adobe Acrobate context menu handlers Combine File in Acrobat and Convert to PDF

The details of the shell extension that might cause the problem:

Shell Extension Name:	GDContextMenu Class
Filename:	contextmenu64.dll
Description:	Google Drive shell extension
Company:	Google
Product Name:	Google Drive
File Version:	3.42.9858.3671
CLSID:	{BB02B294-8425-42E5-983F-41A1FA970CD6}

If you think that you have similar problem in your system, you can try to fix the problem by disabling the specified shell extension. In order to do that, simply follow the instructions below:

1. Download and run the ShellExView utility from this Web page.
2. Find the right shell extension according the details specified above.
3. Select this shell extension and press F7 to disable this extension. After disabling the shell extension, check if the problem still occurs. If the problem still occurs, you should enable back the shell extension by pressing F8, and then try to search for another shell extension that might cause your problem.