Right!! you must have the version without Virus Protection. This detected a Trojan.Virtumonde which is also an advertisement BHO but considered a Trojan because it makes multiple copies of itself. It is known in Kaspersky as the following:The bottom line is this engine is polluted. We have had so many problems with 7.50 that we uninstalled it and went back to 7.10. 7.50 would not run our level at all. It got Errors on every model (W 1309) about not having the right sized textures. The only problem is that none of our textures are off-size. They are all to the power of two and square, 64x64, 128x128, 256x256 etc. So rather than mess with it we went back to the previous version.