1. Alert when trying to re-register and 2. Where can I download earlier version?

[YXtanyaXY]

Hello,
Windows XP SP2 (248 MB RAM) Avast! 5.0.545 expired:
I hardly use the PC so I did not know the program had expired.
1. I do not want 6.X OR 7.x. but want to re-register.
When I hit "Re-Register now" I get an alert page:
"avast! Security Alert"
LARGE RED X (?on symbol of a monitor(?)) and to the right are 3 "!" marks (vertically arranged)

START OF SECURITY ALERT PAGE
avast! Security Alert
X

!
!
!

END OF SECURITY ALERT PAGE

What is this for?

2. Can I download a newer copy of 5.x
Thanks!

[Asyn]

I do not want 6.X OR 7.x.

Why..??

[YoKenny]

I do not want 6.X OR 7.x.

Why..??

Because they only have XP SP2 (248 MB RAM) that is bareley able to run XP plus XP SP2 is quite outdated!

Support for Windows XP Service Pack 2 ends on July 13, 2010
http://support.microsoft.com/gp/lifean31