|This could be one of two things in my opinion. |
The first option is that someone at your home downloaded a program called slow-pcfighter.exe. This is potentially a "legitimate download" although there are some copies that have been listed as malware. Therefore it could be a false positive.
Secondly, It could be an IRC BOT. I would recomend that you look for a file on your computer useing file search with search hidden files and system files for a file 1.reg
this will eliminate two posibilities, we can go on from there, however these are the easiest to check.