Dear experts, I have a 2010 hp desktop PC.4gb ram,1 gb ati graphics card,intel core i3.the PC appears to have problems.it shuts down unexpectedly showing some colourfull horrizontal lines for half a second before.then sometimes it opens normally and sends signal to monitor and others it doesn't send signal.1 month before,I changed my hard drive and got a 500 gb new one(I think I didn't do the partition as expected because at hard drive properties in "my computer' menu it shows 150 gb),I installed wind 7 pro(hacked) but the problem hasn't been solved.sometimes I take out the rams and clean them carefully and then it works fine for some hours.what is your opinion.I use 42 inch brand new lg TV with 720p cable and the PC screen is larger than my TV,so I can't see my mouse all the time.when I use the catalyst control center to fix it,some repeated thin grey lines appear very fast to several spots on the screen and then emidiatly disappear.this happens,until I switch it off ,very often like every 2 seconds.could that cause the shutdown?
