I have to say that even if i believe your guide does in fact help to enhance performance it is extremely likely and very easy to fuck your system while screwing with several options. The more you do , the more conflict is likely to create. So don't download 200 programs that make faster your computer .I say this without reading your guide just generally. To enhase performance i recommend defragment , defragment , defragment and a Hard disc with at least 30% empty. Also update your system . *beware thoough it happens that an update may not always work or cause problems , keep that in mind). I also recommend some programs (whose name i currently forgot) that scan all your computer "activities" in a log and then experts can read those logs and explain if anything is wrong with your system.