Solution
To solve this, disable the Anti-Aliasing option in the graph settings. After doing this, the computer will run normally and it won't slow down. To disable the Anti-Aliasing follow the next steps:
- Right-click the plot legend
- Select Anti-Aliased from the shortcut menu
- Make sure the Anti-Aliased option is not check-marked
If the plot legend is not visible, right-click the graph or chart and select Visible Items ยป Plot Legend from the shortcut menu.