F-Prot Antivirus for Windows

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F-PROT Antivirus for Windows is one of the leading antivirus software applications on the market today. Built on the award-winning F-PROT Antivirus scanning engine, F-PROT Antivirus is renowned for its reliability, ease of use, fast scanning and exceptionally low resource consumption. New and unknown threats are detected with advanced heuristics technology, providing the strongest possible defense available for your laptops and your desktops

ازل فيروساتك التي تملئ جهازك وانطلق بسرعة الصروخ الي عالم خالي من كل فيروسات الانترنت وديدانه

AntiVirus 8

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Omniquad AntiVirus virus detection engine provides protection from new and more complex virus threats that are appearing. It automatically protects you from viruses, worms, Trojans and backdoors. Scans and cleans already infected PC before installation. Downloads new updates
automatically. Virus reference database. Emergency disk creation and scheduled scans
Download now
لحماية جهازك من كل ديدان واحصنة طروادة برنامج خفيف جدا حجمه لايتعدي 9 ميجا يحمي جهازك عند تصفح الانترنت الحماية اتوماتيكية البرنامج مجاني لمدة 30 يوم فسارع بتحميله

download AVG Anti-Virus

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This antivirus program for your home or office computer is easy on system resources and simple to install and use. The fully automated update process will keep your computer protected at all times. Components include AVG Email Scanner, which checks your incoming and outgoing e-mail for viruses; AVG Resident Shield, which checks for viruses as files are opened, executed, and saved and will prevent you from opening or running an infected file; and AVG Virus Vault, a place where infected files are isolated so they cannot cause damage to your system.
Version 8.0.87 may include unspecified updates, enhancements, or bug fixes.
برنامج الavg بإصداره الاخير يوفر لك اقصي درجات الحماية والتمتع بجهاز خالي تماما من الفيسروسات والديدان انه بحق يستحق التجربة فالتجربة خير دليل

what is cd ?part 2

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What is the difference between CD-R “fixation” and “finalization “?
Fixation is the process of writing the lead-in and lead-out information to the disc. This process finishes a writing
session and creates a table of contents. Fixation is required for a CD-ROM or CD-Audio player to play the disc.
Discs which are “fixated for append” can have additional sessions recorded, with their own session lead-in and leadout,
creating a multisession disc. When a disc is “finalized” the absolute lead-in and lead-out for the entire disc is
written, along with information which tells the reader not to look for subsequent sessions. This final table of
contents (TOC) conforms to the ISO 9660 standard.
What is “disc at once”?
Disc at Once is a writing mode that requires data to be written continuously, without any interruptions, until the
entire data set is transferred to the CD-R. The lead-in, program and lead-out are written in a single event. All of the
information to be recorded needs to be staged on the computer’s hard disk prior to recording in the Disc at Once
mode. This mode is usually preferred for discs that are sent to a CD-ROM replication facility when CD-R is the
source media. Recording in the Disc at Once mode eliminates the linking and run-in and run-out blocks associated
with multisession and packet recording modes, which often are interpreted as uncorrectable errors during the glass
mastering process.
What is “track at once”?
Track at Once is a writing mode that allows a session to be written in a number of discrete write events, called
tracks. The disc may be removed from the writer and read in another writer (given proper software) before the session
is fixated. The written sessions contain complete “tracks” of information..
What is “incremental” or “packet” writing?
Track at Once writing is a form of incremental write which mandates a minimum track length of 300 blocks and a
maximum of 99 tracks per disc. A track written “at once” has 150 blocks of overhead for run-in, run-out, pre-gap
and linking. Packet write, on the other hand, is a method whereby several write events are allowed within a track,
thus reducing the overhead. These “packets” are bounded by 7 blocks for run-in (4), run-out (2) and link (1).

what is cd ?

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What is CD-Recordable ?
CD-Recordable is compact disc technology that allows the user to create their own CDs. This is done by means of a
recording system that uses “write once” type optical discs standardized by Philips and Sony and documented in the
“Orange Book, Part II” and a CD recording device that is connected to a host system. Typically, the host system is a
personal computer which also contains recording software.
What is the Orange Book?
The Orange Book is a document that describes the specification for CD-Write Once (CD-Recordable) technology
developed by Philips and Sony. It defines both the physical structure and dimensions of a CD-R disc as well as the
use of certain portions of the recording surface to record information (the Program Area), to calibrate the recorder
laser power (Power Calibration Area or PCA), to record track information for all sessions (the Program Memory
Area or PMA), and to record the Lead-in and Lead-out Areas that preceed and follow, respectively, the Program Area.
There are several “parts” to the Orange Book. Part II refers to CD-Recordable.
What does Orange Book certified media mean and why?
The Orange Book, Part II is the primary specification for CD-R media. Accordingly, all CD-R media should meet
the Orange Book criteria for recordability and playback. Philips and Sony, the originators of the Orange Book,
provide Orange Book certification of CD-R media.
What is multisession CD ?
The principal purpose of multiple sessions is to allow additional data to be appended to a previously recorded disc.
(Note that some older CD readers can read only the first session of a multisession disc.) A session is defined as an
area including lead-in, program data and lead-out. A CD-R recorder that supports multisession recording can write a
disc that will have multiple sessions linked together, each containing their own lead-in, program and lead-out. Any
multisession-supported CD reader can access the data, whether it was written in the first session or a subsequent
session. Contrast this to the recording structure of a pressed CD-ROM or a CD-R written in “Disc at Once” mode
that contains just one lead-in area and one lead-out area.
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