Hello saul9090 For weapon sprites, you have to keep in mind that the engine supports a resolution of 1270 x 720 so, if you make an image with that resolution, when you want to position and scale your weapon, you should do it more or less with this measure X -1900 Y -1600 SCALE 1. This works for me. I guess it also depends on how big the image is within that resolution. The error may be due to the fact that you exceed that resolution or that the image is too heavy or that it is not the correct format, I use PNG.
The problem of the lights I have not experienced, but maybe it will be solved if you install NET 5 and VC2010 redist.