I am running Windows Doctor 2.7.4.0 on my Windows 8 Asus Ultrabook. I am just wondering, because many people are scared about 'Registry Cleaners' and how they 'speed up' the computer, if I just click 'repair' to fix all the 952 errors it found, will I encounter any viruses or, rather, will anything bad happen to my computer? Or is it 100% safe to just fix everything it finds?