IP Address Problems

[dan]

According to my ISP, my IP address has been changing every so often,
for the last few weeks (possibly longer- they've been deleting the
messages that come up...).

It is supposedly meant to remain the same (using DHCP), but for some
reason it has started to alter, and I must admit that looking at the
IP address now, it does look different.

However I dont know what I could have done / what has happened to
cause this. They suggested spyware or a virus, but I am inclined to
think otherwise.

As I dont know when this started I cant correlate the change with
anything that might have happened.

Is there any reason why I would be assigned different IP addresses?

Is it possible to restrict which IP address to use? Though from what I
understand of DHCP etc. (very little...) shouldn't the server do that
for me?

Dan
--
http://www.danicity.co.uk