platform_Error_bad_module_Friends_friendsUI_dll_not_loading
This is actually quite a simple fix. For those of you looking for a simple solution to this: Fire up my computer; go to C:\Program Files\Steam\steamapps\ Remove winui.gcf In the past I removed ClientRegistry.blob & friendsUI.dll from the C:\Program Files\Steam\ folder and that sufficed. However since the original posting, it seems that has changed. If your still having trouble, post a comment.