Thursday, September 19, 2013

Virtual Box doesn't accept 64 bit OS

When I tried to install BackTrack 5(64 bit) on my Ubuntu machine (32 Bit), it just thrown an error message as shown below.

Error message : VT-x/AMD-V hardware acceleration has been enabled, but is not operational. Your 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of your host computer.

I found 2 types of solutions and applied both of them on laptop. Now it just works fine. They are explained in steps below.

Step 1 : Shutdown the PC(not Restart)
Step 2 : Turn on the PC and goto bios settings
Step 3 : Mine is Lenovo with Intel technology. It has Intel Virtual Technology option in configuration menu (For some PCs .. this will be under advanced settings)
Step 4 : Enable it (Its for enhancing the support to software based virtualisation solutions)
Step 5 : Save and Exit of bios
Step 6 : Continue with your installation of guest OS in virtual box.




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How to check my ubuntu is 32 biit or 64 bit ?

Step 1 : Open terminal by pressing ctrl+alt+T
Step 2 : Type " uname -a " and hit Enter


If it displays i686/i386.. Its a 32 Bit version
else if it displays x86_x64.. its a 64 bit version.





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Wednesday, September 18, 2013

WiFi goes to Limited

We can see that our WiFi connection goes to limited connectivity sometimes. Its annoying in case of urgency.
Here is the solution for Windows !

Step 1 : Open Network and Sharing center
Step 2 : Click on the WiFi connection
Step 3 : Goto Properties
Step 4 : Click on 'Configure' without selecting anything.
Step 5 : Goto power management tab in the appeared box.
Step 6 : Un check the box which says "Allow the computer to turn off this device to save power"
Step 7 : Click OK and close Network and Sharing Center
Step 8 : Open Command Prompt (cmd)
Step 9 : Type ipconfig /all
Step 10:Type ipconfig /release
Step 11:Type ipconfig /renew
Step 12: Close the command prompt.

The above process should solve your problem. If this doesn't contact network administrator or router manufacturer.



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