Please help! The game seems to be working fine, but there's one annoying little thing!

When a hero casts spells like "Lightning" or "Divine Power" on the battlefield, the visual effects of these spells (a lightning flash or divine light falling from above) don't disappear until the unit on which the spell was cast performs some action. For example, it starts an attack. I've tried different versions. This problem exists in all of them, so I understand that the issue is not with the game but with my computer, which, to be honest, is not very powerful: HP mini 3600 Atom 1.66 Ghz netbook, 1 GB of RAM, GMA 3150 video card (latest driver).
I've also tried changing the settings, but it doesn't help. In principle, it's not a big deal, but when there are many units, it significantly affects performance, and it just doesn't look good: a peasant stands there, looking around, and at the same time, a continuous, terrible discharge between him and the sky pulsates....

I found a patch with the comment "removes debris after spells. specifically for weak old machines." It helped – it removed the "debris" after the Bless spell, but the others ("Lightning," "Create Phantom") still leave debris)). I hope for at least some advice on how to disable these effects.

By the way, for some reason, the elven city is displayed as a black silhouette when you enter it, but this is a minor issue compared to everything listed above. I found a separate topic about this, but maybe it's all closely related.

Thank you very much in advance!