Have you received r3fog.dll error message when you finish installing some software? If yes, the source of the problem should be program conflicts. Here is a post about what is r3fog.dll, how it will effect your computer, and how can you totally fix it well.
What is backup4all.exe error? How can backup4all.exe happen? Will it put your computer in danger? How can you fix it well? A post concerning backup4all.exe provides you details about the error and repair guide.