Paul,
Depending upon who is your dial service carrier (aka telco), they MAY choose to
block, at your request, premium rate access.
But that won't protect you totally. Some parasites might have you dial a free
number, then switch you to a premium number, for which you will be liberally
billed.
Your only true defense is, as Jim indicates, keep your computer CLEAN of
parasites. PCPitStop is one resource.
Periodic scans with Spybot S&D and HijackThis are another. And Spybot now
includes two resident components that run permanently on your computer, and
further protect you.
First, download LSP-Fix and WinsockXPFIx from <
http://www.cexx.org/lspfix.htm>,
and CWShredder from <
http://www.majorgeeks.com/download4086.html>. All are
free.
Next, close all Internet Explorer and Outlook windows, then run CWShredder.
Have it fix all variants.
Now check for, and remove, spyware. Get HijackThis
<
http://www.majorgeeks.com/download.php?det=3155> and Spybot S&D
<
http://www.safer-networking.org/index.php?page=download>. Both free.
1) Install and run Spybot. First update it ("Search for updates"), then run a
scan ("Check for problems"). Trust Spybot, and make all recommended deletions.
2) Install and run HijackThis. Do NOT make any changes immediately. Save the
HJT Log. <
http://forums.spywareinfo.com/index.php?showtopic=227>
3) Have your HJT log interpreted by experts at one or more of the following
forums (and post it, or a link to your forum post, here):
<
http://forums.net-integration.net/>
<
http://forums.spywareinfo.com/>
<
http://forums.tomcoyote.org/>
<
http://www.wilderssecurity.com/>
If removal of any spyware affects your ability to access the internet (some
spyware builds itself into the network software, and its removal may damage your
network), run LSP-Fix and / or WinsockXPFIx.
Cheers,
Chuck
Paranoia comes from experience - and is not necessarily a bad thing.