As we all know, Windows XP SP2 adds a brand new protection function - DEP (Date Execution Prevention Data Execution Protection), it is possible to defend your computer from viruses damage. According to Microsoft's DEP technology, Intel and AMD have created a corresponding anti-virus CPU.
DEP
principle of anti-virus technique when you upgrade to SP2, SP2's DEP function enabled to prevent virus harm, given that the DEP to monitor the many different procedures to quit the virus inside the secured memory location to run damaging code. DEP via the processor's NX (No eXecute) function, look for the memory not explicitly consists of executable code within the data (these information are often the supply code from the virus), uncover the information, NX them are marked as . If immediately after a system in memory, trying to apply these with So, when you run a software which has been exposed, DEP will place the virus code marked as
Should you need to give complete play to DEP's safety, furthermore to outdoors must upgrade to SP2, your CPU need to also help the DEP technologies. Currently widespread 32-bit processor (including P4 Northwood, etc.) do not help NX, to assistance the technology, the major CPU 64-bit AMD processor (Athlon 64, AMD Opteron), and Intel's Itanium CPU, J Series P4 Prescott, is said to nVIDIA, Via, Transmeta and other companies also strategy to add the NX in its chip technology, however the tempo of those providers updates NX as well slow, get some time just before the official launch.
approach to enable or disable DEP
By default, SP2 vital Windows programs and services only to allow the DEP. But you'll be able to also setup their very own, to ensure that all plans around the computer enabled DEP, as a way to prevent the virus. Additionally to Acrobat Reader5.0
instance, the make all the applications and expert services are enabled DEP, method of operation is: Account login with administrator privileges SP2, and then click on Double-click Allow DEP .
When you desire to a plan (such as Acrobat Reader five.0) to disable DEP, you may click on the previously mentioned Following the system is highly prone to attack, the virus can sneak in to the plan, after which spread to other software programs around the personal computer and contacts in Outlook, and destroy your personal files. DEP is enabled, if any, following the program cannot function appropriately, it is possible to obtain the software vendor DEP-compatible version on the program, if no such version is to disable DEP.
to assistance DEP, P4 Prescott
use of technology in keeping with EDB Microsoft's DEP feature, Intel for his or her CPU developed technology. Currently Intel P4 Prescott (mPGA478 with LGA775 package deal) or for your C0 core stepping D0, the most recent J Sequence P4 Prescott core with E0 stepping. Only J Series P4 Prescott with anti-virus function, only it actually assistance EDB technologies to fulfill the SP2's DEP antivirus feature that allows for buffer overflow (buffer overrun) Vulnerability inside the design of the virus fail to stop their replication and spread to other systems .
In case you use a P4 Prescott / Celeron D (C0 stepping core) processors, upgraded to SP2, you may obtain a deadlock in the Windows XP operating technique, startup display, but don't place on P4 Northwood may have this dilemma. This is since SP2 can open P4 Prescott (C0 stepping core) consists of the EDB capabilities, but this kind of CPU as well as the execution is not EDB, EDB component of its inner energy transistor won't operate, and therefore trigger the technique to die lock.
To solve this difficulty, Microsoft has introduced in the September 14 amendment to the related documents, we can go to Microsoft's official web page to download. English edition of Windows XP end users to download address is simplified Chinese edition of XP customers to obtain handle
to support DEP, AMD 64-bit CPU using EVP strategies
AMD 64-bit processors the very first to assistance Microsoft's DEP technologies. As a way to meet the DEP, AMD and Microsoft to style research and improvement of AMD's new chips function AMD 64-bit processors (such as the Athlon 64/Athlon 64 FX / Athlon 64 cellular version / Sempron cellular version, and so on.) will have the EVP. EVP and SP2's DEP function technical cooperation,
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Nevertheless, AMD 64-bit processors inside the machine right after setting up SP2, as long as your personal computer begins, the DEP function, and configure the necessary driver files named Mpegport.sys hardware, whenever you use the Sigma Style Corporation Realmagic Hollywood Plus DVD decoder software will conflict using the DEP. This really is given that older drivers are some comparable operation using the virus, so SP2 to error it for your virus, which trigger the DEP, cause the computer to repeatedly restart. To solve this problem, Microsoft suggests that users update the older driver, or disable decoding software program for that DEP, turn off the SP2 virus protection.
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