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
???