Any advise on what to do when your PC keeps going to disk boot failure? Normally I would think it's to with the fans that keep the hard drive cool so I have strip down my PC and vacuumed the fans which were pretty clogged up. Do you think that was the problem or do you think it could be something else? I have to say the PC sounds loads better since I vacuumed the fans.

Any advise would be welcomed.

it might be that ur power supply is on its way out glyn i had the same problem with my daughters comp so i sent it down my brothers whos a bit of an expert cos i couldnt find what was wrong.
he found that the power supply was on its way out so he suggested changing it luckily he had one there and changed it for me and the comp is right as rain now
ur right about the fans though they do get clogged up quickly i usually clean all three desktop comps once a month dont take long and like u said the computers sound a lot better.
a new power supply is pretty cheap and its easy to install

Cheers mate.