You really need to be careful about services. When you have rookies getting in to the services and cutting things off, one mistake and they can lock themselves out of their system. In some cases it results in having to reinstall windows and losing everything that was on the C: drive. Dangerous stuff there.
As for advertising on other websites a word of caution there. ASK FIRST. Popping in and having your website in your sig or profile and not coming back and being an active member, can lead to your banning as a spammer.
Proper forum etiquette is to ask an admin or senior moderator what the rules are about advertising a competing computer website. You'll find you get a lot further if you ring the door bell first instead of barging in.
Also the tweaker programs you recommend should have a warning. BACK UP your system first. Or at the least do a restore point. Some tweaker programs are crap and the user needs to have a mattress to land on rather than the cold hard concrete.
I wouldn't swear to it but I think we've had this discussion before. SEO
is crap and a waste of time and money. Content is king.