Is there a way to block certain URL's in IE?

The Hosts file can also be used to create nicknames for links. In my Hosts file I've added entries for the IPs to our HTML enabled hardware (like the networked printers) along with their short names; ex.
123.456.789.000 XYZ1 #Laser Printer
So if I need to check out the XYZ1 printer I can simply type "XYZ1" in my browser address bar and the Hosts file redirects me to the correct IP and opens up it's HTML maintenance screen.

how can i stop downloading from a particular url atomatically?

too much sites are blocked. Whenever I try to access "Required URL is not allowed". Is there any way I can pass through it?.
Thanks.

not sure about this, but would it not be faster to use "0.0.0.0 badsite.com" ? (the 127.0.0.1 method is also very annoying when running a webserver)

i want to prevent some email from sending to my hotmail email

my email
[Email Address Removed]

That'd be this article: http://ask-leo.com/how_can_i_keep_someone_from_contacting_me_in_email_or_instant_messaging.html

i want to block passport network because i cant go on my msn...okay thankx

No, you don't. Blocking passport will prevent you from being able to log in. This article has more: http://ask-leo.com/how_do_i_delete_this_microsoft_passport.html

I dunno what happened. Recently, I cannot log into pages such as ebay.com and mail.yahoo.com

Also, I cannot get into any microsoft pages and cannot login to my MSN Messenger.

Would you by any chance know what is going on?
Thx.

My first guess is spyware or virses. Do an up to date scan for both.