When I try to insert a chart, the mouse pointer turns into an hourglass for 10 seconds and the chart is not inserted.
The think-cell add-in in PowerPoint is waiting for a connection to Excel. The connection to Excel fails either because your machine is extremely busy or because the think-cell add-in in Excel did not start properly. Wait a few seconds and then try again.
If the problem persists, think-cell might be automatically disabled as described in KB0005.