Does your computer restart suddenly?

This problem maybe cause by viruses or an error but if the windows tells you that the computer restarted to de protected from hardware damage or tha there are errors in RAMs you should know that your RAMs are often well and the problem is in a new hardware you have connected to your PC ,but you may say that you didn't connect any new hardware ,then you should make sure that your power supply is working well as it mainly causes this problem.You should also make sure that your DVD/CD ROM is working well as if the mechanical parts of them stopped ,the windows will shut down at once to prevent the damage.

DirectX 10 for windows XP

There is no official version of Microsoft DirectX 10 for windows XP and I searched the web to find any working DirectX 10 for XP but I found that they are all fake except one. I downloaded this program and found that there are many unwanted files come with it and also a song! I deleted them then tried to install the program and it was completed successfully. Then I restarted my computer to view what's the result. It works properly and I tested my computer to view the directx version and I found that it was DirectX 10 and I also test a game to see the change and it was beautiful experience. But WARNING this program add two site to your favorites in you web browser and these sites can install spyware on your computer and one of them called " DirectX 10" and the other called "MA" which mean the Massive Attack web site.
You can download it from medaupload without any unwanted files Here.

What will you do if Quick Time asks for a CD to run a normal video file ?

In some cases when you try to open a multimedia file with Quick Time player,it asks you to put a CD into the CD drive to open that file although it is on the hard disk. The quick solution to this problem is to put any CD into the CD Drive, but the real reason for this problem is that you have added a file that was on a CD or DVD  to the favorites menu and for an unknown reason ,the program must check if this file is exist on the CD before opening the file you want open at that moment. So, you should remove the file from the favorites or delete all the favorites by this method: open the folder " Documents and settings " then "All users" then open " Application data " then "Quick Time".
Search for the file " quicktimefavorites.qtr " then delete it. Restart your computer and this problem will completely disappear.

4 powerful and free antivirus programs

You shouldn't spend too much on antivirus programs while there are good free programs and I introduce some of them:
NanoScan
www.nanoscan.com
This program can analyze all the running programs  and find all trojans and viruses then delete them within  a minute.

ThreatFire Antivirus
www.threatfire.com
This program can discover viruses by their behavior not by the older ways and its results are accurate.

Avira Antivir Personal Edition 
www.free-av.com
This a good protection program that can provide a reasonable level of security and can work with other protection programs.

Hijack This
www.trendsecure.com
You should follow some steps to activate this program. It's a free program which enables its user to receive technical support from specialists to help him get rid of any malware program.

How to stop windows shutdown process caused by viruses or malware

Some viruses and malware programs try to turn your computer off while you are working on it and give you a message saying that your computer will shut down after 30 second and you can't save what you were doing ,so you should quickly stop the shutdown process to save your work just do the following:

-From start menu choose RUN

-Write "shutdown -a" that means abort shutdown ,then click OK and that will stop the computer shutdown operation .

There are some useful commands that you should know:

-"shutdown" or "shutdown -i" will make the windows log off

-" shutdown -r" means restart.

-" shutdown -f " means turn computer off .

-" shutdown -t xx" that means turn of the computer after xx seconds, and this is the method that some viruses   use to shutdown the computer.

-" shutdown -c (message) " this will enable you to give a message to the user when the windows shutdown, write the message between (    ) and it shouldn't contain more than 127 characters.

3 very rare icons most of users don't know

Here I'll provide you with two useful shortcut icons to put them on your
desktop to make you do two things faster.
First: Turning the computer off or logging of are very boring actions
,so you can easily make shortcut to turn your computer off faster
follow these steps:
1.Open the Notepad and write
"Rundll32.exe shell32.dll,SHExitWindowsEx 2"
with this form.
2.From File menu choose "save as" then choose a name for it.
Ex: shutdown.bat
Note: (*.bat ) must be the file extension.
3.If you want to make shortcuts to other functions ,replace the number "1"
in the end of the command with other numbers. Use the following table:

Num. / Function
0 / Log off
1/shutdown
2 / restart