that is quite normal so dont be too worried
its the average temp for lower performance CPUs
and celeron can stand up to about 80C

is it a socket 370?

you could buy a better HSF to get a cooler performance and safer use

just dont be too worried with it, but to be on the safer side, maybe change the HSF
i would suggest swiftech's MCXC370

which can be found on price grabber for about 40 USD

http://www.pricegrabber.com/search_g...4d3c626a2136d/