The full error reads: 'Microsoft .NET Framework — Unhandled Exception has occurred in your application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately. The requested resource is in use. (Exception from HRESULT:0x800700AA)'.
This is most likely caused by Adobe not releasing the PDF after previewing it in the Document Launcher window. Try disabling the Enhanced Security option in Adobe Reader.
In Adobe Reader, click Edit, then click Preferences, then click Security (Enhanced).
Clear the Enable Enhanced Security checkbox.
Restart your machine.
If that does not work, contact your IT team about installing an alternative PDF reader.