I'm pretty sure the video card isnt overheating (no dust in there really) and well, Id imagine the lock-ups would happen more often. Since it seems really finicky what videos it'll lock up on. Or it'll lockup over and over and over and then behave for awhile and then randomly lock up without warning. I mean, if it really was the video card overheating, it wouldve done it with XP. When it was running XP it would hum a long. without a problem. I actually read about this issue (out of interest since I like this stuff) And well, it's not ussually apparent, but 98 SE uses a totally different GDI system than XP. The XP one allows for things like Flash to run properly to summerize, because there's some kind of hardware interaction thing that works differently. That probably why if I want to lock up my system just for kicks, all I have to do is press the HQ button on a Youtube video. It freaks out Windows 98, because Windows 98 just doesnt know what to do. I blame Adobe. They are probably aware of the 'bug' but they dont care for fixing it for 98 users... Well, because supposidly no one uses 98 I guess . No sticker with numbers on my PC. It's a Pentium 3 beige box, bought from a friend.