Hello, unfortunately disabling shadows is not really considered at the moment, given that prior to 2.10 update, they were completely absent from the game. The shadows I'm referring to are the marble shadows and they are the only kind of shadows available in the game. If you're talking about the dark parts of the level, that's just basic lighting and should be easy to compute. Also, you can standardize this lighting through the Options > Gameplay > Advanced Options > Standardize Sunlight option.
As for marble reflections, there is an option to disable those.
Also, computers which can't even compute these marble shadows have bigger problems to deal with - they would not be able to meet the minimum requirements to run the game at all.
By the way, your very first post got filtered out by the anti-spam measures as you had attachments/links in them. Responding to it: I can assure you that it was a false positive and MBPU does not have any viruses.
