flashing Karbonn A7 with cwm

1. Driver: http://www.mediafire.com/?25slld940jy5ah6

Plug the USB cable connected to the computer, the computer will notice a new hardware device called TianyuHSUSB, click Next and select "Install from a list or specitific location", then click Next.

Unzip the downloaded file Driver.zip above, click on "Browse", find the extracted driver folder. Then click Next to install it begins. Repeat the above steps until the popup window does not appear anymore.

2. Recovery: 

http://www.mediafire.com/?9acykurklkaaz9u

http://www.mediafire.com/?pu0d5u86e3c7oc5

Turn off your phone, then press and hold the Volume Up key and power button until the screen appears green, Then take your hands off, plug the USB cable into the computer.

Unzip the file CWM-English.rar After you unzip it, open file recovery.bat, will appear a command line window, in each window, we press a command line any key to reboot the machine is installed it ClockworkMod Recovery v.5.0. 2.8 for the machine.

If you press any key but the window just hangs forever waiting for device ie you have not installed the correct driver for the ADB, disconnect the USB cable and reinstall.
courtesy: xda-developer forum