What gives? Secured or not secured, that is the question

I tried to get here on and old windows xp home system my children use and Im getting notice  "this site can't provide a secure connection" 

forums.wtt (dot)com uses an unsupported protocol   err_ssl_ version_ or_cipher_mismatch"

if I look at details it says 

client and server don't support a common ssl protocol … the server needs RC4, which is no longer considered secure

Pont is I can't get on from said computer to post logs to inspect and check for malware. 

Know what I am doing wrong suggestions? I did just flash BIOS to the updated version from 2003 or 2008 but I don't see that being a big deal; also, it was a couple of days ago. 

Thanks

What browser are you using? Try the latest Firefox as IE7 is useless and Chrome doesn't support XP any more.

EDIT**

So FF does work. My computer hates getting old. Thanks.

You're welcome.