iMac in Safari gets Beachball when loading a page

[MacbookAlum1536]

Hey
My parents iMac is getting the beachball after about 5 minutes online on any browser (AOL, Safari, and Firefox) but every other Mac in the house is loading fine. The iMac is on Snow Leopard and was bought in July of 2008. I have absolutely no idea, so any help would be appreciated.
Thanks in Advance

 

[Hellhammer]

Does all browsers have the latest updates installed? Try repairing permissions with Disk Utility

 

[MacbookAlum1536]

Does all browsers have the latest updates installed? Try repairing permissions with Disk Utility

Yeah, their all up to date and i'll try that.