Run the antivirus program in your computer. Check for trojan, viruses, malware etc that you've probably got from visiting such sites you've mentioned earlier. Also use extension such as AdBlocker for your browser. Browsing the internet is safer with such practice. If you are used to using Internet Explorer, then you should change to better browser such as Firefox, or Opera which are much more safer.
Eh really? sorry xD and im not good with technology at all :/ but this is a big com with a tonne of ram and stuff ( but only a little left i think ) but it can take almost anything really. whats your best option?
Okay Necro, slow down with the thread creating cause you are still doing it wrong. There are several thread in the Manga/Novel section which answers your query. I'll try to see if I can still assist you with some your issues. How computer literate are you? Do you have antivirus tools and such in your software? Give me a general idea.