Showing posts with label computer. Show all posts
Showing posts with label computer. Show all posts

Friday, June 19, 2009

Cloud AV : Antivirus Software Apocalypse?

Talking about data security issues is one of the most urgent in the computer world. But with the new threats – malwares, viruses, Trojans, worms, spywares, etc – that keeps on attacking the data security, antivirus software has become more and more passive in their battle. Not to mention that this multi-thread software is consuming most of your computer memory upon start-up and while running. Needless to say, the hackers and virus-makers are controlling the game.

There is a need to update your installed antivirus suites on a daily basis to prevent data vulnerability. But once a kind of threat is not included in your antivirus database, a leak for infiltration could start some serious problems. It may take more than a week before your antivirus program can develop an antidote for such threat, giving enough time for virus-makers to create 2-3 strains of computer viruses.

Good thing that Cloud AV could save the day. It is a new kind of data security architecture that strain threats right before they get into your computer unit. Incoming files are already scrutinized on the server and not on the local PC. Plus, the N-Version Protection works like more than one antivirus engines running on your PC. The three major mechanisms of Cloud AV start with a Light-Weight Host Agent which transports incoming files to the network for analysis, then to a Network Service which is the analysis center, and finally to archival and forensics service which decides how to manage the analyzed files. This Cloud AV can only be installed on a host agent, thus, greatly cuts the cost and effort of installing antivirus software per computer unit.

Tuesday, June 16, 2009

Computer Tutorials: What is Windows Registry?

Computer Registry or popularly known as Windows Registry is a central storage area of different kinds of data from all parts of a computer system. Specifically, it consists of information coming from the hardware settings, applications stored, Operating system used and the users of that particular computer unit. Modern version of Windows Registry such as the ones found in Windows 9x, have already combined the REG.DAT and INI files. Its obvious advantage from its older version is the easy access of varied files. It is also ideal for massive structured data due to its simple hierarchy.

When inspecting a Windows Registry, one may think that all of the data came from a single source. Actually, the displayed data is stored on different physical files. User-specific information are stored in USER.DAT while computer-specific information is stored in SYSTEM.DAT.

Its architecture is well organized therefore it is easy to understand. On the left part of the display is the registry tree while on the right pane is a list of data. The tree is divided into 6 parts which are called root keys or top-level keys. They can be easily identified because their names would usually start with HKEY_. Each top level key holds sub keys. These sub keys could also contain a set of sub keys. The lowest levels of keys are called values.

Applications use the registry by adding or deleting a key. Consequently it can also create and delete the value from a key. Frequent installation and removal of programs in a computer could cause invalid and missing keys, which in turn causes the system to crash and the computer to slow down. Constantly removing of hardware and spywares on a computer also adds up problems to your Windows system registry.

It is possible to view and edit the registry using the Registry Editor provided by your operating system. Or you could also opt using the third party editors. However, it is strongly suggested to stick with the Microsoft product. Great care must be considered in editing the registry. Errors in registry could seriously immobilize your computer. But if you are equipped with the right knowledge and technical know-hows editing the registry would be an easy task.