Pls help me to correct it !

In the internet network, people can communicate with each other online by means of face book, a social network that provides the user account. So that one can send and receive emails with other user respectively. And the same as the former Windows messenger; which is now upgraded to Windows Live Messenger, that provides chat online service and is similar to Skype.
Nowadays, many people prefer to use internet networks to communicate with each other by email or chatting. It is because of more convenient and cheaper to do so. But it is of upmost importance that precaution must be taken to prevent the hakers' attack and infultration. Otherwise, the hakers will steal one's personal information for their purposes. Regarding this, people should be cautious not to open website, email or download document which one did not know nor familar with the senders.

2011-08-21 00:17:43 補充：
Amendment: hakers should be corrected and hawkes is the correct word.

2011-08-21 00:18:46 補充：
Further amendment: hawkers is the correct word.

There are many communication tools in the world, such as Facebook, which is a social networking service that users may create a personal profile, add other users as friends and chat with them; and Windows Live Messenger (formerly named MSN Messenger), an instant messaging client which is similar to Skype. Nowadays, many people prefer to use communication tools to chat with friends instead of using telephones or writing a letter because they are cheaper and you can chat with people all around the world. However, in this world, there are many hackers do bad things through Facebook or other communication tools , like stealing someone’s personal information and etc. So when we use communication tools, we should keep our data secret. Try not to put your real information on website and we should not make friends with strangers.