Issue
I've experienced lag when viewing in the viewport window, selecting objects', and moving selected objects'.
Attempted Solutions:
Adding more computer RAM (previously 8gb, now 64gb)
Reinstalling Blender
Turning off OpenGL Depth-Picking in the User Preferences
Observations:
The issues always happens over time, while at first there is no lag, no matter how simple or complex the scene is.
Computer Specs
Minus the said RAM upgrade:
OS: Windows 11 Home (15-dy2024nr, Natural silver) Brand: HP 15-inch Laptop CPU: 11th Generation Intel Core i5-1135G7 GPU: Intel Iris Xe Graphics RAM: 8gb (now 64gb) SSD: 256gb
Conclusion
I forgot to mention it's just about everything that slows Blender down when I'm using it. So, again, scene complexity is not a contributing factor to my lag I think.