As all of us know, Windows XP SP2 adds a brand new safety function - DEP (Date Execution Prevention Data Execution Protection), it is easy to safeguard your laptop or computer from viruses harm. According to Microsoft's DEP technologies, Intel and AMD have created a corresponding anti-virus CPU.
DEP
principle of anti-virus system when you upgrade to SP2, SP2's DEP feature enabled to prevent virus damage, considering that the DEP to keep track of the various procedures to stop the virus inside the safeguarded memory location to run damaging code. DEP by way of the processor's NX (No eXecute) characteristic, search for the memory not explicitly includes executable code within the data (these data are frequently the supply code from the virus), obtain the information, NX them are marked as . If immediately after a system in memory, trying to implement these with So when you operate a software that has been uncovered, DEP will likely be the virus code is marked as
If you want to provide full perform to DEP's protection, furthermore to exterior need to upgrade to SP2, your CPU have to also support the DEP technologies. Presently popular 32-bit processor (which include P4 Northwood, and so on.) do not help NX, to support the technologies, the principal CPU 64-bit AMD processor (Athlon 64, AMD Opteron), and Intel's Itanium CPU, J Sequence P4 Prescott, is mentioned to nVIDIA, Through, Transmeta along with other organizations also strategy to add the NX in its chip technologies, but the tempo of those providers updates NX as well slow, get some time just before the official launch.
method to enable or disable DEP
By default, SP2 important Windows applications and services only to allow the DEP. But you can also set up their very own, to ensure that all programs about the computer enabled DEP, so as to prevent the virus. Furthermore to Acrobat Reader5.0
instance, the make all of the applications and services are enabled DEP, technique of operation is: Account login with administrator privileges SP2, and then click on Double-click Allow DEP .
If you would like to a system (which include Acrobat Reader 5.0) to disable DEP, you could click the previously mentioned Following the system is highly susceptible to attack, the virus can sneak into the program, and then unfold to other applications to the computer and contacts in Outlook, and destroy your personal files. DEP is enabled, if any, right after the system can't purpose appropriately, you'll be able to acquire the software vendor DEP-compatible edition of the system, if no such version would be to disable DEP.
to support DEP, P4 Prescott
utilization of technology in line with EDB Microsoft's DEP feature, Intel for his or her CPU developed technology. Presently Intel P4 Prescott (mPGA478 with LGA775 package) or for your C0 core stepping D0, the most recent J Series P4 Prescott core with E0 stepping. Only J Series P4 Prescott with anti-virus function, only it truly support EDB technologies to satisfy the SP2's DEP antivirus characteristic that enables for buffer overflow (buffer overrun) Vulnerability inside the design from the virus fail to stop their replication and spread to other programs .
Should you use a P4 Prescott / Celeron D (C0 stepping core) processors, upgraded to SP2, you'll acquire a deadlock in the Windows XP operating program, startup display, but do not place on P4 Northwood will have this trouble. This is given that SP2 can open P4 Prescott (C0 stepping core) includes the EDB capabilities, but this type of CPU along with the execution isn't EDB, EDB part of its inner energy transistor will not operate, and as a result trigger the program to die lock.
To resolve this challenge, Microsoft has released within the September 14 amendment for the related documents, we are able to go to Microsoft's official site to download. English model of Windows XP users to obtain deal with is simplified Chinese edition of XP customers to obtain handle
to support DEP, AMD 64-bit CPU using EVP tactics
AMD 64-bit processors the first to support Microsoft's DEP technologies. To be able to meet the DEP, AMD and Microsoft to design study and advancement of AMD's new chips function AMD 64-bit processors (including the Athlon 64/Athlon 64 FX / Athlon 64 mobile version / Sempron mobile version, and so on.) may have the EVP. EVP and SP2's DEP function technical cooperation, to stop
Nevertheless, AMD 64-bit processors inside the device right after putting in SP2,
Windows 7 Professional, as long as your laptop or computer begins, the DEP characteristic, and configure the needed driver files named Mpegport.sys hardware, after you use the Sigma Design Organization Realmagic Hollywood Plus DVD decoder software will conflict with all the DEP. This can be given that older drivers are some similar operation together with the virus, so SP2 to error it for the virus, which trigger the DEP, trigger the laptop or computer to repeatedly restart. To resolve this difficulty, Microsoft recommends that people update the older driver, or disable decoding software for that DEP, flip off the SP2 virus protection.
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