Adaware 

One of the most annoying spyware is adware. Adware is a program designed for advertising. Advertising thought pop-ups, advertisement, etc. It often contains parasites. Ad-Aware from Lavasoft is one of the best adware “killer”. It also detects and deletes spyware, malware, toolbars, hijackers, etc. It is one of the most popular software.

Advantages:

• Userfriendly: easy to install and to use;
• Provides very good pop-up blocker;
• It is able to find up to 30,122 components;
• Provides founded spyware description;
• Provides real time monitoring;
• Alerts about attempts to download spyware or adware;
• Available ActiveX blocking;
• Scans downloads that you want to download;
• You are able to scan all computer at a time or devices or files appart;
• You are able to restore files that you have quarantined or deleted;
• Fast and effective search of less known spywares;
• Provides help and support services;

Apart from the great number of advantages, it has some disadvantages:

• It costs more then other anti-spyware software which provides better security and services ($41.91 annual price).
• No automatic updates. You have to update it regularly yourself.
• No schedule scans.
• Poor technical support.
• Lack of useful information in help support.
• Does not detect keyloggers.
• Sometimes it supports pop-ups: even if you don't surf on Internet it shows some pop-ups.
• Real time blocking is not very effective. Sometimes it asks to install spyware if you want to get rid of it and afterwards it doesn't find it.

Although Ad-Aware is very popular and well known but it's not the best from the all anti-spyware programs. And also it costs more than better one's. It's effective against pop-ups, but if you want only a pop-up blocker don't buy Ad-Aware, because there are single pop-up blockers that does better work. Ad-Aware is good in most cases, and especially in some versions, like The Professional edition, which provides command-line and log-file support. All in all there are plenty of users that are pleased with Ad-Aware's performance.