If you are very young and have no much money, i recommend you Avast! Home.
It's very good.
Differences betwen home and pro are:
Enhanced User Interface (Professional Edition only)In addition to the Simple User Interface, the Professional Edition presents the Enhanced User Interface, giving you access to all features and possibilities for extensive scanning control.
Unlike the Simple User Interface, the scanning is performed by so-called "tasks". First, you define a task, including various parameters - areas to scan, what to scan, how to scan, etc. Having the task, you can run it (possibly repeatedly). Each task generates a list of results, which you can work with later.
Another key feature, closely connected with tasks, is the Scheduler. This feature gives you the ability to schedule the tasks running, either one-time or periodically.
Additionally, it is possible to set all existing scanning options, a feature not available in the Simple User Interface.
Script Blocker (Professional Edition only)The resident protection of the Professional Edition includes an additional module, not contained in the Home Edition, called Script Blocker. This module watches all scripts being executed in the operating system (so-called WSH scripts - Windows Scripting Host), and scans all the scripts run as a part of a web page within your web browser (Internet Explorer, Netscape Navigator and Mozilla).
PUSH updates (Professional Edition only)A special feature of the Professional Edition is PUSH updates. It is a dramatic change in the philosophy of updates. Usually, every installed program checks occasionally for new version availability. PUSH updates, however, are initialized by our server; they result in your computer quickly responding and performing the necessary update. The system is based on the SMTP protocol (as used for e-mail messages). The update itself is controlled by the avast! resident e-mail providers (MS Outlook and Internet Mail).
The whole system is protected by asymmetric ciphers and is resistant to unauthorized misuse.
Command-line scanner (Professional Edition only)For experienced users, the Professional Edition features a command-line scanner. Scanning can be controlled by many arguments and switches; to use as a pipe filter; and a special STDIN/STDOUT mode is available.
The module is intended to be used in BATCH programs. Its output is the same as the output from the Enhanced User Interface tasks (including the report files).
I use Avast! home, and i'm bery happy( in future i'll purchase Pro, now i have no money
). No virus infections, no problems, no slowdowns. And a lot of common sense
You can see my signature, all freeware.
