I do not believe it’s the fan. But, the sounds the computer makes are indicating very clearly when it’s about to slow down. Instead of making the “scrunchy” sounds continuously(as a normal computer does when it’s working), the “scrunchy” sounds comes in very distinctive intervals between four seconds of absolute silence . I’ve recorded a sound file which illustrates what I mean(OBS it’s an .aac file).

The sound the computer makes when it’s slow can be found here: http://www.sendspace.com/file/6xc47j

So during the time it sounds like this(like the file), the computer is slow and very uncooperative. I have no idea why this is. It comes very sudden too.

Should I run the OTL scan in the latest post?