Help  booting freezes on the loading screen with

Hi guys, I'm not entirely sure whether this is a software or a hardware problem since I'm not so advanced in this area so please bear with me and if somebody would be so kind as to lend me a helping hand here that'd be much appreciated. It all started when I cleared my pc of dust. World of Warcraft crashed, had to reset and the starting up screen with windows logo was striped vertically with dotted lines and it froze in a couple of seconds. I was able to boot windows normally several times after going into safe mode and just restarting again, but it was random and worked only a few times. Tried to reinsert VGA and memory, reinstalled video drivers and windows. Then the pc speeker started to make a high continuous beep, according to Award BIOS beep codes it should mean a RAM error, but when I tried a different chipset the problem persisted. I basically tried everything the past 12 hours and nothing helped. my specifications: