I've tried absolutely everything both on this forum and elsewhere to resolve this issue, to no avail. I tried to install MBAM even on clean, freshly installed version of windows XP SP3, both "real" (on laptop) and virtualized (virtualbox) and always encounter this error during first (or subsequent clean) installs. So it's not improperly uninstalled application, nor it is a infection (while that may be true in other cases), but rather an old timey problem of "DLL hell". MBAM probably expects one particular version of Ms visual C++ runtime to be present. My question is, which one? I did try several combination, but was unsuccessful. The problem only seems to affect XP, on 7, clean installation of MBAM did indeed resolve the issue. Thank you for your answer, but please, not the generic one.