In our modern life, computers are like our friends. They can help us better, and they can open our minds and widen our horizons. Computers are now being used everywhere, whether in the factories, in schools or in governments. Therefore, they play an important role in our life. However, everything has two sides, and computer is not an exception. Computer viruses and horses result in your computer program being damaged, hackers can easily invade your pc and change your papers, even steel your core documents. Confronted with this problem, we should take a series of effective measures to prevent them. For one thing, we should find the type of software according to computer's situation. For another, we install it and prevent hacker attacks. There are five free softwares for us to adopt.

SUPERAntiSpyware
It is one of pc tools that can completely scan the spyware in market, and it's a free version. Its interface is very simple, mainly divided into: scan computers, management the program, code library online updates, you just click the next, which can check, delete the garbage spyware in computer. Besides, it also supports protection function in time, which can protect your computer IE browser not to be modified by malware.

Ad-Aware
It's a system security tool. It can scan your memory, the registry, hard disk, external memory, and find advertisement tracking files and related components, and then you can delete them safely according to your choice. Registry cleaner, disk cleaner and registry defrag are all its function. When you download it, you can clean your system easily, and it will protect your privacy highly.

Spyware Terminator and A-Squared Free
They are both type of free and easy to use tools to remove spyware, meanwhile they can protect the computer system from Trojan and malicious attacks. Spyware Terminator owns a malicious code feature library and supports free update services online, which can prevent new malware attack. At any time, A-Squared Free can update the information on the malicious software through online.

Spyware Doctor Startet Edition
Spyware Doctor Startet Edition is free edition of Spyware Doctor, and it is included in Google Pack. Users not only download it from Google, but also download separately.Compare with Spyware Doctor, it belongs to based version containing less function with basic file monitor, manual scanning, automatic updates and other functions, it's enough to satisfy the need of general users.
Registry is definitely an integrated portion of a Laptop and it can be responsible for storing all the critical information and sensitive info pertaining to any plan or components that has been installed or attached together with the Personal computer. When the registry is gone corrupted inside a Personal computer you will find most possibilities that the Personal computer won't operate well according to its capacity or efficiency. The efficiency more often than not lessens in drastic way and which impacts overall operate you receive it performed together with the assist of it. This is the reason an excellent relevance is often provided to windows registry and how to protect it. Although as time elapsed and considering that very first windows launch 3.0 Microsoft has released its new variations of operating systems the high quality has also improved of registry method and it really is now less vulnerable in the direction of failures or finding corrupted. Yet so far as total failure or possibilities of finding corrupted are involved it's not completely gone and this is the reason we'd like to pay out focus in the direction of this. On broad stage we might divide this in two categories. 1st we could get it done manually i.e. to correct registry manually or we are able to consider a assist from any Registry Booster to restore windows registry this helps make our task particularly easier and in addition, it produces an automatic backup which can be utilised to reverse unwelcome adjustments if it's got made mistakenly anytime. Aspect from this there are various positive factors employing a Registry Booster or registry cleaner. In contrast to an antivirus program, this specifically functions on windows registry and protects it from any menace, malicious plans, unwanted changes, and so on. A Registry Booster checks for just about any anomaly, if finds in registry and corrects it quickly which improves windows overall functionality. Right here a necessary items must be take into account prior to working or using any Registry Booster or registry cleaner system that the plan should never effect your PC's other features in nonetheless. Someday it can be observed that as a substitute of making it more quickly or enhancing performance it has an effect on badly and adversely a Personal computer.