can you suggest that which anti spyware tools is the most protective for block it.

James,

There are two programs that come to mind

Spybot S&D:

Download from here: http://www.download.com/Spybot-Search-amp-Destroy/3000-8022_4-10122137.html?tag=mncol

Again, another amazing program. This program targets a specific type of virus called Spyware but I've seen it pick up all sorts of nasties. It has the added advantage of a realtime protection firewall. One disadvantage to this program i've found is it takes up a lot of system resources and can slow your computer if the realtime firewall is enabled. You can easily fix this by disabling it however.

Additionally Superantispyware has been known to pick up infections that other programs do not.

SuperAntiSpyware Free Edition - Free software downloads and reviews - CNET Download.com

You should only have one program of each type however, since it can cause conflicts

Thanks for your input, but re: malware removal, PCHF only allows Security Team members to give advice. LGW

For blocking i would suggest some antivirus package, because most of them come with spyware dectection, (i use avast), and they usually cost as much as a anti-spyware program. But u can also download the free version such as AVG which is great for antivirus and spyware...