The internet is a useful tool used for information and communication; but is also the source of many security threats. These threats are likely to cause serious damage to the person’s computer as well as cause data loss. Some of the security threats include worms, viruses, spyware and Trojans. These security threats especially viruses are transferred through sharing of infested storage devices such as flash disks, CDs, P2P networks and floppies.

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Computer processes refer to the procedures involved in the executing of instructions given to the computer by its users. The processes enable one to carry out several tasks at the same time. The computer security on the other hand refers to the branch of technology that deals with the security of the information in a computer known as information security. This refers to the security of the property and information so that it remains accessible as well as productive to the authorized users only.

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Defragging a registry is part of the computer’s maintenance tasks that one should carry out in order to enhance the performance of their computer. Defrag should be done frequently since the more a computer system is used, the more the data becomes scattered to different areas of the disk.

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Stop errors happen as a result of the lack of response of the Windows XP Professional. The messages are sent by software and hardware malfunctions; they usually appear on either a black d or blue background. Stop errors are also known as the Blue Screen of Death. Some of the most common of these include:

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Cache is the collection of information, which is duplicated from the original values that are stored some where else or have been computed earlier. The original information is expensive to locate or compute compared to reading costs. In addition, the cache may be described as a temporary area to store information that is frequently accessed rapidly. Once the information is kept inside the cache, it is to be used for future reference by opening the copy other than re-fetching the original information.

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DLL is a short term for the Dynamic Link Libraries that are found on the Windows operating systems. Specifically the systems that use it are Windows vista, 98, XP, 2000 and Windows Me. On these operating systems the Dynamic Link Libraries files are tasked with a number functions that various applications can put to use.

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The Microsoft Company has a limit that it enforces regarding any TCP/IP connection that is half open and hard-coded within tcpip.sys for windows vista. The utmost simultaneous, outbound incomplete TCP connections attempts made per second is normally intended for limiting the spreading of malicious worms and viruses. In addition, it limits the chances of inducting DDoS attacks. However, it is easy to see that it has the ability to limit a number of applications by use of quite a number of TCP connections like P2PTV and P2P programs.

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