Hewlett Packard Pavilion Slimline s3700y (NC689AAR) PC Desktop

WHEN I WAS READY FOR MY NEW COMPUTER I DECIDED TO GO WITH THIS HP SLIMLINE IT WAS A NICE SIZE HAD ALL THE FEATURES I WANTED AND WAS PRICED RIGHT, BUT I HAVE BEEN VERY DISSATISFIED WITH THIS COMPUTER IT HAS SOME MAJOR KINKS WITH IT--I WAS HAVING PROBLEMS WITH IT RANDOMLY SHUTTING DOWN SO EVERYONE SAID ITS YOUR POWER SUPPLY YOU CAN NOT FIND PARTS AT BEST BUY OR ANY LOCAL PLACE FOR THIS SLIMLINE CAN ONLY GET THEM THROUGH HP SO I GET THAT AND GUESS WHAT STILL DOES NOT FIX THE PROBLEM I COULD BE ON FOR MAYBE 5 MINS AND IT WOULD SHUT OFF SO SOMEONE SAID TRY THE FAN BUT ITS RUNNING FINE SO WE CHECK IT ANYWAY STILL WONT STAY ON . NOW WE HAVE FOUND THAT IT OVERHEATS AND I HAVE TO KEEP A SMALL FAN BLOWING RIGHT ON THE COMPUTER FOR IT TO STAY ON VERY ANNOYING IF I TURN THE FAN OFF THE COMPUTER WILL SHUT DOWN WITHIN 5 MINS WHEN I HAVE SOMEONE LOOK AT IT THEY SAY EVERYTHING WORKS FINE THE FAN INSTALLED JUST DOES NOT COOL WELL ENOUGH SO NEXT TIME I NEED A COMPUTER I WILL NOT BUY THIS SLIMLINE