Monday, August 19, 2013

Windows 7 Not Detecting External Hard Disk_Solved!


Hi friends,

Last week,I brought my friend's Seagate 2TB external hard disk to backup some files on my computer. That hard disk runs on 9v ac adaptor,connect the adaptor to ac 220v supply,and connect usb port to pc and work. I connected the adaptor to mains,and usb to my Acer Aspire One h532 netbook,led light on harkdisk glew,my windows 7 given regular "ping" sound confirming that it has detected the harddisk,but the device is not showing on My Computer! I waited for few minutes,tried refreshing my computer,still no signs of harddisk! I connected the harddisk to another desktop computers having Windows7 and Windows XP,it worked for both. I again tried connecting the harddisk to other two usb ports on my netbook,didn't help! Then I ran my genius brain ;-) and solved the problem! Here's how-

Right click on "computer" (previously called my computer),choose "manage", choose "device manager",expand "universal serial bus controller",select your problematic device(in my case,it was named 'external'),right click on it,and select "uninstall". After the uniinstallation process,.disconnect the device from your computer and restart your computer. Now after restart,reconnect your device,this time windows should detect your device and and automatically reinstall required drivers for it,you can see the progress in taskbar.

If this trick does not work,and you're confirmed that the device is ok,you can perform a "system restore" from "start menu",type 'restore',and choose "system restore",and follow the on screen instructions,in Windows7.

Thanks for reading!

How To Install & Configure Java JDK On Your Computer?


How To Install & Configure Java JDK On Your Computer?

How to enable your computer for java programming?

First,download Java Development Kit(JDK) form one of the following addresses-

Double click the downloaded file(in our example,it should be named as  jdk-7u6-windows-i586.exe) and follow the installation process,there will be two installations,one for the JDK, another is JRE(Java Runtime Environment).

After the installation,go to Command Prompt by pressing Windows Key+R. Type java -version and hit enter,it'll show interpreter's version. Then type javac -version and hit enter. If the javac command completed successfully then you don't have to follow the steps below. But,if you get an error like this-  'javac' is not recognized as an internal or external command,operable program or batch file ,then do the following-

Go to Start -> Control Panel -> System -> Advanced System Settings -> Environment Variables, select the system varable named "Path" and click the Edit button. Add the address of java's bin sub-directory at the end of the list in the Variable Value field(in our example C:\Program Files\Java\jdk1.7.0_06\bin) then click the ok button.

To test the environment open command prompt by pressing Windows Key+R.
Type java -version and hit enter to see interpreter's version number.
And type javac -version and hit enter to see compiler's version number.
Both the versions should match. If it matches,you're ready to do java programming!

Note: Other than java programming,if you install the jdk,you'll be able to run java-archives(i.e .jar files) on your computer! There are plenty of java applets(small applications) are available on the internet for free! Also java is needed for surfing various internet sites.

That's all!

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Thanks for reading!

If you feel that some particular key is not working properly of your external keyboard then you can use internal keyboard on your desktop screen. This property of keyboard is found in windows xp and seven.

How To Do This. 

1.Go to start menu and press “run
2.Type: osk
3.Now press enter.

you will see keyboard on your desktop screen.Now use mouse to click on keys for operation.
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