Do you want to speed up your PC? Well if you want to speed up your PC, here are a couple of things that you can do to increase your computer’s performance.

Speed Up Your PC By Fixing Windows System Files
The Windows system is comprised of a group of program files that work together to run all applications such as word processors, email, internet browsers, etc. By scanning and fixing the System files, you will improve the function and speed of your PC.

To scan and fix your Windows System files, you must use the System File Checker(SFC), which is located within your computer.

To use the SFC to scan and fix the Windows files, follow these steps:
• Close any open programs on your Desktop
• Click on the Start button
• Click Run
• Type this command in the Run box: SFC /SCANNOW
• Click the “OK” button

Fixed your system files, but you CPU is still running slow? If this is the case, then there may be a serious problem stopping your computer running at its full potential. 85% of most slow PCs have a damaged windows registry. To speed up your PC, you will need to repair the damaged files.

Speed Up Your PC Guaranteed By Using Registry Cleaners

The windows registry acts as the brain behind your computer and is a crucial component that contributes to your CPU performance. The purpose of a registry cleaner(RC) is to help repair and fix all the errors that have accumulated throughout the years of use and restore your computer back to its original “out of box” state.

Want to speed up your computer, guaranteed? Visit: Top Registry Cleaners

There are literally 100’s of different RCs out on the market today and many of them claim to speed up your CPU. However, the reality is that only a handful of RCs are truly effective and are even safe to use.

Which RCs are the safest and most effective? Visit: Top Registry Cleaners

The majority of software vulnerabilities that have been discovered and exploited are buffer overflows. Research has shown that two out of every three software vulnerabilities found are of this type. This is why it is important to understand and defend against buffer overflow attacks.

When a user interacts with an application, it has to validate the input, because the input could contain incorrect data, control sequences or to much data for the application to work with. When one of these events takes place, a buffer overflow can occur. Attackers who realize this exploit essentially try to overwrite the memory on an application stack by sending too much data to the input buffer.

Overflow attacks often arise from a bug in the application or from improper use languages such as C or C++. At the time these overflows occur, the valid data can be overwritten with the data from an attacker. The code the attacker feds back into the program is most likely malicious code that can cause damage to computers or steal user data.

In most buffer overflow attacks, the attacker tries to intercept a program function that reads input and calls a subroutine. Applications make a subroutine call and it places all input parameters on the stack.

The subroutine returns by also placing the return address on the stack by calling the function. Attackers can overwrite the return address by sending data that is longer the fixed memory space on the stack.

So basically what happens here is the attacker intercepts the application communication and can then insert his own malicious code. The end result of this type of attack is the malicious code may now be executed with the privileges of the legitimate application.

Most buffer overflow attacks are used to root a system or to launch a DoS attack. Rooting a System means the system has been hacked and the attacker has root or superuser privileges. It is important to understand how buffer overflow occur and the attacks used against them. It is hard to detect buffer overflow attacks so implementing preventative measures is critical.

Matt has been practicing computer security for over 5 years now. You can check out his latest website Active Directory Tools which provides a list of useful tools for Network Administrators.

Firewall technology has been around to protect networks for quite some time. Over the generations this technology has evolved into several distinct types. Knowing the different type of firewall technology will give you confidence in deciding which type of firewall to purchase. Common types of firewalls are as follows:

• Static packet filtering

• Circuit level

• Application layer

• Dynamic packet filtering

Static Packet Filter

A static packet filter firewall examines each packet against a set of rules. If the firewall rules allow this type of packet, it will then allow the packet to pass through. If the rule does not allow the packet then the packet is dropped or rejected depending on how the firewalls rules are set.

Circuit Level

This type of firewall validates the fact that a packet is either a connection request or a data packet belonging to a connection or a virtual circuit. Circuit level firewalls work on the transport level of the protocol stack. They are fast and transparent, but do not check the data in the packet.

Application Layer

A application Layer Firewall evaluates network packets for valid data at the application layer before allowing a connection. These types of firewalls determine if a connection to a requested specific application is permitted such as, email or internet access. Application Layer Firewalls can also validate other security items that appear only within the application layer data, like user password and service requests.

Dynamic Packet Filtering

Dynamic Packet Filtering Firewalls also known as stateful firewalls keep track of the actual communication process through the use of a state table. This type of firewall operations at layers 3, 4, and 5. Dynamic Packet Filtering firewalls can inspect and track each connection passing through the firewall on all interfaces. This technology allows the firewall to confirm they are valid packets.

It has become increasingly import for growing business and home users to implement a firewall solution to protect computers and user data. Over the years the firewall technology has evolved. It’s important to understand the different type of firewall technology that is out today. Having this knowledge will help your purchase the right firewall solution for your company or personal use.

Matt has been a Network Administrator for over 5 years now. You can check out his latest website Active Directory Tools which provides a list of useful tools for Network Administrators.