Top 5 Tips For Your System To safe

1) Installing the security patches.
               Vulnerabilities in software are constantly being discovered and they don't discriminate by vendor or platform. It's not simply a matter of updating Windows; at least monthly, check for and apply updates for all software you use. 

2) Useing firewall.
              No Internet connection is safe without one. Firewalls are necessary even if you have a dial-up Internet connection -- it takes only minutes for a a non-firewalled computer to be infected.  


3) Take control of your email. 
              Avoid opening email attachments received unexpectedly -- no matter who appears to have sent it. Remember that most worms and trojan-laden spam try to spoof the sender's name. And make sure your email client isn't leaving you open to infection. Reading email in plain text offers important security benefits that more than offset the loss of pretty colored fonts. 

 4) Restrict Administrative Access.  

In a household or office where many people share computers, everyone is at the mercy of everyone else. No matter how safe you try to keep your computer, anyone else with administrator access can install a virus-infected program.

In these multi-user environments, it pays to restrict administrator access to only the users who know how to keep the computer safe. In fact, I suggest you create just one administrator account for each computer and then give every user their own non-administrator account.
Only when you need to install a program or change a setting should you use the administrator account. For everything else, you should use your own user account. This helps avoid the situation where you accidentally leave your administrator account logged in and the next person on the computer uses it to accidentally download a virus.

5) Encrypt Sensitive Files.
Even if you work really hard at avoiding viruses and other malware, you should prepare yourself for the chance that one will make it onto your computer any way. Backups protect your files from being deleted, but what protects your sensitive files from hackers?
The only thing that can protect your sensitive files is encryption. Higher-end versions of Windows include encryption, but you can also download a free encryption utility that provides just as much security (if not more—Microsoft is under pressure by some governments to put a “back door” into their encryption.)
To secure your files against hackers and other prying eyes, I suggest the free TrueCrypt encryption software.