Hi @rundoverme ,

>>>>>The program is very slow even though it appears to be using all 6 cores.

Do you have this issue in all of your drawings? How complex are your drawings?

What Visual style do you use in your drawings?

If it is other then "2D Wireframe", try to set it to "2D Wireframe".

Do you use Parametric Constraints in your drawings?

If yes - try to remove them all.

Are there any blocks on the "Recent blocks" tab of the Blocks Palette?

If yes, try to remove them with "Clear all" from right-click context menu inside "Recent blocks" tab.

>>>>> The turn Ortho off temporarily, hold down the Shift key DOES NOT WORK

Did you have this problem from the very beginning?

If this appeared suddenly - you can try to Reset AutoCAD.