computer hardware and software

Common Ethernet network cables are straight, crossover cable and roll over. This Ethernet network cable is made of four pair high performance cable that consists twisted pair conductors that used for data transmission. Both end of cable is called RJ45 connector. The colour of wires are orangewhite,orange,greenwhite,green,bluewhite,blue,brownwhite,brown . The cable can be categorized as Cat 5, Cat 5e, Cat 6 UTP cable. Cat 5 UTP cable can support 10/100 Mbps Ethernet network, whereas Cat 5e and Cat 6 UTP cable can support Ethernet network running at 10/100/1000 Mbps. Cat 3 UTP cables are not popular anymore since it can only support 10 Mbps Ethernet network. Straight,crossover cable and roll over can be Cat3, Cat 5, Cat 5e or Cat 6 UTP cable, the only difference is each type will have different wire arrangement in the cable for serving different purposes. Straight Cable You usually use straight cable to connect different type of devices. This type of cable will be used most of the time

This registry hack can bring back the missing Undock PC option to your Start menu. 1. Click the Start button and type regedit in the Start Search box. 2. Click the arrow next to HKEY_CURRENT_USER to expand the Software>Microsoft>Windows>CurrentVersion>Policies>Explorer 3. Right-click a blank area on the right side and choose New > DWORD Value 4. Give the value a name of NoStartMenuEjectPC. 5. Give it a value of 0 to show the Undock PC option. 6.A value of 1 disables this feature. ***Instead of HKEY_CURRENT_USER, you might want to try HKEY_LOCAL_MACHINE if you only have a default account in Windows. Use the same path for this setting.***

Windows XP My Recent Documents History located on the Start Menu is deleted when logging off an user account. The most likely cause of this is malware utilizing Group Policy Objects which enforces policies for system settings and/or user account's settings. The Group Policy for Clear history of recently opened documents on exit will cause My Recent Documents History to be deleted when logging off an user account when enabled. Group Policies are typically applied at businesses to control access to programs, system properties, and user account settings. For Home users, My Recent Documents History being deleted at logoff can be enforced by these Group Policies but usually malware is the culprit. If you are a home user and the My Recent Documents History being deleted at logoff then there is a good chance you are infected with malware.Otherwise there is a chance for encrypting or hacking the windows may also cause this problem Manual Steps For Group Policy Editor Click Start and then R

Windows XP Background area located in the Display Properties under the Desktop tab is restricted/disabled.The most likely cause of this is malware utilizing Group Policy Objects which enforces policies for system settings and/or user account(s) settings. The Group Policy for Prevent changing wallpaper will cause the Background area to be restricted/disabled in Display Properties when enabled. Group Policies are typically applied at businesses to control access to programs, system properties, and user account settings. For Home users, Background area can be restricted/disabled by these Group Policies but usually malware is the culprit. If you are a home user and the Background area is restricted/disabled from the Display Properties and looks like the pictures below then there is a good chance you are infected with malware Manual Steps For Group Policy Editor ***The Group Policy Editor requires Administrative privileges and is only available for Windows XP Professional Edition. Windows X

Windows XP Theme tab is missing from the Display Properties. The most likely cause of this is malware utilizing Group Policy Objects which enforces policies fo r system settings and/or user account(s) settings. The Group Policy for Remove Theme option will cause the Theme tab to be removed from Display Properties when enabled. Group Policies are typically applied at businesses to control access to programs, system properties, and user account settings. For Home users, Theme tab can be removed these Group Policies but usually malware is the culprit. If you are a home user and the Theme tab is missing from the Display Properties and looks like the pictures below then there is a good chance you are infected with malware. Manual Steps for Group Policy Editor ***The Group Policy Editor requires Administrative privileges and is only available for Windows XP Professional Edition. Windows XP Home users can use the Windows XP Registry method to remove the Group Policy restriction.*** Click Star

Disabling start menu is a way of hacking windows XP.Before editing you must be aware of basic knowledge in computer.It is an easy way that is explained in step by step Click START–>RUN and type REGEDIT. Click OK. Click the plus sign next to HKEY_CURRENT_USERthen SOFTWAREthen Microsoftthen Windowsthen CurrentVersionthen Policiesthen Explorer Double-click on NoSimpleStartMenu if it exists. If it doesn’t, right-click on ADVANCED and Select NEW–>DWORD VALUE and name it NoSimpleStartMenu Set this value to 1 to disable the XP menu. This setting will permanently disable the Windows XP style Start Menu unles the policy or registry is changed.

Windows XP Settings tab is missing from the Display Properties. This because of the malware utilizing Group Policy Objects which enforces policies for system settin gs and/or user account(s) settings. The Group Policy for Hide Settings tab will cause the Settings tab to be removed from Display Properties when enabled. Group Policies are typically applied at businesses to control access to programs, system properties, and user account settings. For Home users, Settings tab can be removed these Group Policies but usually malware is the culprit. For a home user and the Settings tab is missing from the Display Properties and looks like the pictures below then there is a good chance you are infected with malware. Manual Steps forGroup Policy Editor ***The Group Policy Editor requires Administrative privileges and is only available for Windows XP Professional Edition. Windows XP Home users can use the Windows XP Registry way to remove the Group Policy restriction.*** Click Start and then Run

Windows XP Screen saver timeout numeric box located in the Display Properties under the Screen Saver tab is restricted/disabled .The most likely cause of this is malware utilizing Group Policy Objects which enforces policies for system settings and/or user account(s) settings. The Group Policy for Screen Saver timeout will cause the Screen saver timeout numeric box to be restricted/disabled in Display Properties when enabled. Group Policies are typically applied at businesses to control access to programs, system properties, and user account settings. For Home users, Screen saver timeout numeric box can be restricted/disabled by these Group Policies but usually malware is the culprit. If you are a home user and the Screen saver timeout numeric box is restricted/disabled from the Display Properties and looks like the pictures below then there is a good chance you are infected with malware. Manual Steps : Using Group Policy Editor NOTE: The Group Policy Editor requires Administrative pri

A network is defined as two or more computers linked together for the purpose of communicating and sharing information and other resources. Most networks are constructed around a cable connection that links the computers. This connection permits the computers to talk or to send message or to transmit data (and listen) through a wire. Types of Networking Cables: The three main types of networking cables are coaxial cable, twisted-pair cable and fiber optic cable. Coaxial Cable: Coaxial cable is made of two conductors that share the same axis; the center is a copper wire that is insulated by a plastic coating and then wrapped with an outer conductor (usually a wire braid). This outer conductor around the insulation serves as electrical shielding for the signal being carried by the inner conductor. A tough insulating plastic tube outside the outer conductor provides physical and electrical protection. At one time, coaxial cable was the most widely used network cabling. However, with impr

Windows XP Screen Saver tab is missing from the Display Properties . This is because of the malware utilizing Group Policy Objects which enforces policies for system settings and/or user account(s) settings. The Group Policy for Hide Screen Saver tab will cause the Screen Saver tab to be removed from Display Properties when enabled. Group Policies are typically applied at businesses to control access to programs, system properties, and user account settings. For Home users, the Screen Saver tab can be restricted (removed) by enforcing Group Policies but malware on your computer is usually the culprit. If you are a home user and the Screen Saver tab is missing from the Display Properties and looks like the pictures below then there is a good chance the computer you were using is infected with malware. Manual Steps Using Group Policy Editor The Group Policy Editor requires Administrative privileges and is only available for Windows XP Professional Edition. Windows XP Home users can use t

Intel Hyper-Threading Technology can be defined as “Hyper-Threading Technology (HT Technology) is a ground breaking technology that boosts computing performance to keep pace with today's applications and operating systems. HT Technology enables a single processor to function as two "virtual" processors by executing two threads in parallel, allowing you and your software to multi-task more effectively than ever before”. Intel has introduced Hyper Threading technology for pentium 4 processors . Hyper-Threading (HT) Technology is available on notebook, desktop, server, and workstation systems. Hyper-Threading Technology requires a computer system with an Intel® Pentium® 4 processor supporting Hyper-Threading Technology and an HT Technology enabled chipset, BIOS and operating system. Performance will vary depending on the specific hardware and software you use. Here is a list of Intel Pentium 4 processors that support hyper threading technology. For Hyper-Threading technol

Portable computers , once a novelty, are now a part of everyday business life. Portable computers work and act just like larger systems, except they are very compact. This study note will give u a brief description of portable computer types. Types of Portable Computers : Portable computers are classified according to size and function. Today there are three basic types of portable computers: laptops, notebooks, and subnotebooks. Laptop Computers With advancements in battery technology and the advent of functional, large-screen, liquid crystal displays (LCDs), the first truly portable computers, referred to as laptops, were produced in the late 1980s. These units featured integrated AT-compatible computer boards, including I/O (input/output) and video controller functions. Laptops, as mentioned, usually feature a folding LCD display and a built-in keyboard and pointing device. They also use an external power supply and a removable, rechargeable battery. Today's laptops have fairl

Complementary Metal Oxide Semiconductor(CMOS) is a small portion of battery powered memory on the motherboard that contains system settings like types of drives, device types in the system, which drive to start up from etc. The battery used is a 3volt battery. CMOS and BIOS are often interchanged although they are different things. Think of the BIOS as the skeleton frame upon which the CMOS settings hang. All computer memory forgets everything it holds when power to it is shut off. If the power was totally shut off to your CMOS, your computer would forget its start up settings, and you’d have to re-enter these settings every time you started your computer! Fortunately this is not the case as your CMOS always receives enough power to remember its settings, even when your computer is off. How? It is powered by a small lithium battery on your motherboard. Lithium batteries are designed to last years, and often outlive the usefulness of the computer they reside in. If you keep a computer l