Hi, I'm using Windows 7 with a HP Compaq 6715s notebook without problems except one: when watching youtube videos with Firefox 3, Windows 7 crashed now 4 times since I installed the beta (about 2 weeks). The screen then turns black and I have to shutdown the notebook manually with the power switch. My GPU is a ATI Mobility Radeon X1250 and I haven't installed any extra graphics drivers, using the graphics drivers Windows 7 provides. CPU AMD Turion 64 X2 TL-56, 2 GIG Ram, 160 GIG internal hard drive, WLAN activated when watching online. Do you guys know how I could handle this problem?