you may be having a graphics card error, as you navigate with windows you may not be dumping your cards cach, as a result after a while it fills up and crashes, try updating its driver, post if it still dosent work

Try updating your graphics driver to the latest version?

sorry for the late reply. Yes, I updated the graphics driver with tht latest version but it still freezes.

you processor or video card maybe overheating ,open the case and make sure all fans and heatsinc are free of dust/dirt .

yes i checked all fans and they are all working.

Hi there
Once you've cleaned your system inside check your fan's especially the one sitting on your cpu if its working properly.after doing the above do this:
with your tower case open(to monitor your fan continueselly to see if it bails on the.
system-cpu fan esp)start up your windows.
when logged in,immediately go to task manager end keep the window open to monitor processor activity.now, while monitoring cpu fan and processor performance you will be able to track if the problem lies with cpu,to rule it out as a possibility. before computer freezes see if the processor's performance went ski-rocketting and if fans stopped.
also post full system specs on next post
???

hi. thanks for the reply. the fans did not stop when computer freezes. it will not also freeze if it is in idle mode. unless i do some browsing, opening forlders or it's doing other processes like burning cd then that's the only time it shows white screen.

ohk...interesting.tell me can you remember the last activity before it all started to begin.
also do you use onboard graphics? what is the graphics specs

as far as i can remember, i just browse through the internet and watch movies on the computer, havn't installed anything new.

- Intergrated UniChrome Pro 3D Graphics in VIA® K8M800 chipset
- Shared Memory Max. 64MB

I'm sorry, I don't know anything about onboard graphics