hey, my windows 7 installation doesnt recognise my harddisk at first boot, it just sends me to the BIOS and there i can see theres no HD, i start it up again, now it boots, but freezes at the starting windows screen, after about 3 minutes it gets to the welcome screen, and it takes another 3 minutes to show the desktop, after letting it startup for 30 minutes, i try to startup chrome, this also takes about 3 minutes, chrome loads pages really slow, in about 1 minute. also if i try to start up spotify, it takes about 30 minutes before i can use it, but after about 5 clicks, it freezes and my whole computer doesnt work anymore, i already installed windows 5 times, but it doesnt change a thing. please help