i have an old g4 1.25 GHz w/an 80 gig hard drive that is nearly full. lately, both safari and firefox crash every couple of minutes. if i'm on youtube watching a video, it will crash even sooner. i'm wondering how to fix this issue and am considering wiping the hard drive clean by doing a reformat. wondering if i'm on track, or if this is too extreme a measure. if i DO reformat, what's the best way to go about it? btw- i'm running tiger 10.4.11