Priced at Rs. 9,499 Lenovo A526 is the latest addition to the brand’s smartphone line up running Android 4.2 JellyBean operating system. The phone features a 4.5 inch touch screen display offering 854 x 480 pixels resolution. Lenovo A526 is powered with 1.3 GHz quad-core Mediatek MT6582M processor and 1GB of RAM from which we can expect smooth performance and lag free multitasking. The dual sim phone also has a 5 Megapixel rear camera and a 0.3 Megapixel front facing camera for video calling and conferencing. With Lenovo A526 we get built-in 4GB storage memory which can be further expanded upto 32GB using MicroSD Card. The phone seems good in connectivity supporting 3G (HSDPA: 21 Mbps, HSUPA: 5.76 Mbps), WiFi 802.11 b/g/n, GPS and Bluetooth 4.0.
Lenovo A526 clearly appears to be an affordable mid ranged device, hence you should get a PC suite for the same which will help you to get most out of the phone and secure your data. Using this small tool for windows, you can backup or sync your messages, emails, contacts, appointments, tasks, etc on your computer or sync it with Google, Yahoo and even with MS Outlook. It keeps your phone updated to the latest available firmware version and also allows you to connect your lenovo phone as a Modem for sharing internet over USB tethering. Using this PC Suite you can setup sync for your multimedia files and office documents between your PC and the phone so that you always have a secure backup of your important files on your computer. Best of all, it allows you to Backup or Restore your entire phone including all files and folders, as wells settings in just one simple click. If you want you can also download the usb drivers for your Lenovo A526 from this page which is also very important while installing custom roms or rooting your phone. 
Download PC Suite and Driver
why usb is not connecting to the pc. help me out of this critical situation
When you connect the USB Cable, go into the Notification Panel and select USB Storage.