I heard that you get magics at the same speed at 75 WC and 99 WC so I sent in a query because I didn't think it was true. Turned out not to be. Mod edit: Messages from Jagex are confidential. Feel free to summarize what your response was if you wish to continue this discussion.
All I could suggest is do a full system scan with Ad-Aware (http://www.lavasoft.com/), Scan with Spybot (http://www.download.com/3000-2144-10122137.html?part=104443&subj=dlpage&tag=button) and maybe go out and buy McAfee Antivirus software.