Here we go.. the "coolwebsearch" nasty guys have escalated their efforts and now even are blocking access to some security sites by altering people's hosts files once again. It appears that cwshredder hasn't been updated to catch this yet.. Please read this thread by Tom Coyote.
http://forums.tomcoyote.org/index.php?showtopic=3053

there are only two entries in that thread so far, so I'll quote them (both made by Tom)

Jan 15 2004, 09:07 PM
This is to inform that there is a version of CWS going around that will block your access to anti-spyware sites

There will be an email soon to all members of this board so that you know what to do in order to regain control over this problem

Pass this information on to your friends as they may not be able to get here without your help
Jan 15 2004, 09:19 PM
Are you having difficulty accessing security-related websites ?

You could have been hit by one of the latest hosts file scam by the Not-Coolwebsearch people...

Easy enough to fix this.

Get this program called Hosts File Reader. It will show the hosts file wherever it is located.

http://members.shaw.ca/techcd/VB_Pro...FileReader.exe

Run the program and look at the bottom part of the window, if an entry is there, double click it.

You should see the contents of that file appear in the top part of the window. You can then change, delete, append, do what you want to the file using that utility.

If you do not consciously use a hosts file, you can choose to delete it. If you do use a hosts file, then you probably know how to deal with the entries listed.

If you aren't sure, there is the "Enable/Disable" function you can use. Disabling, will backup the current hosts and create a new default one. By doing this, you should be able to access those sites again.

The current (partial) list of sites blocked by this latest malicious hosts file is:

forums.spywareinfo.com
www.spywareinfo.com
www.merijn.org
merijn.org
spywareinfo.com
www.computercops.biz
computercops.biz
dslreports.com
www.dslreports.com
www.lavasoftsupport.com
lavasoftsupport.com
forums.net-integration.net
www.tomcoyote.org
tomcoyote.org
www.wilderssecurity.com
wilderssecurity.com
www.lavasoftusa.com
lavasoftusa.com
security.kolla.de
www.security.kolla.de
www.lavasoft.de
lavasoft.de
If you haven't heard of CWS, then you should read the info at this link.
Document last updated: January 5, 2004
http://www.spywareinfo.com/~merijn/cwschronicles.html

HiJackThis...Zipped version of CWShredder --
If you get a virus warning for W32/Generic.worm!p2p, try this link instead: Unpacked version of CWShredder
If you get a message saying 'A required dll, MSVBVM60.DLL, was not found', install this first:
Visual Basic 6 runtime libraries from Microsoft