confused

I have been doing HTML for about 4 years now and have come across a strange situation. I have a laptop with Win 95 and older versions of Netscape and IE. I have 2 desktops - 300mhz ibm and 1 ghz clone. The clone has Netscape v. 6.x and a newer version of IE. The IBM has basically the same browsers as the laptop. 

I can open an HTML file on the laptop and the blink, marquee, and bgsound tags will work. But when I do this on the clone, the same tags don't work. I haven't tried it on the IBM lately but it used to work. I now use an SBC browser, which is IE dressed up for SBC, and the tags still don't work. I can access my web site but these don't work. I know that certain tags have been deprecated but couldn't find much on the W3C web site about these three tags. Any ideas?