Have to say that if this is a new system it should be covered under warranty and you'll get no joy if you start opening the case yourself
E-mail the helpline and quote the figures and see what they say
I'm an AMD man myself and know that many AMD Athlon processors run at upwards of 80deg without problem and within spec. The figures you quote would not give me cause for concern, but, as I say,Pentium is a closed book. Have you looked on the Intel web site for processor temperatures?
Finally, what do you mean by "main" fan? Although some of the system fans may go up and down in speed and, I suppose, may stop altogether, the fan on the processor runs all the time doesn't it?
If it's under warranty and working well and ain't broke why try to look for trouble. Just enjoy