How to root lenovo A7000? I have tried to root lenovo  a7000 a with kingo root application with no success. My computer will be infected due to this method as the download page for apk file forces me to download malicious file.SRS Root claims to support this device but is SRS Root safe? Is there any other way to root my device ?
maxritz from XDA Developers has built a ClockWorkMod (CWM) recovery that works for Lenovo A7000-a by porting the CWM recovery for Lenovo K3 Note.

Here's a link to the recovery file: A7000-CWM-Final.zip

You'll need a Windows computer and Smart Phone Flash Tool to flash the recovery file. Instructions on how to flash CWM using SP Flash Tool are listed here and here.

Once you've flashed the CWM recovery, you'll need to get the latest version of SuperSU and flash it by booting into CWM recovery (do that by turning the phone off, depressing the volume keys and then pressing the power button until you boot into CWM) and selecting the ZIP update package.

You can get the latest version of SuperSU in ZIP format here: http://download.chainfire.eu/supersu

According to maxritz, you'll need to delete the recovery-from-boot.p file from the root filesystem /system as it may overwrite the recovery and undo your changes. You could do that by using a file manager app like AROMA Filemanager that works in Android recovery environment. Usage instructions and download links for AROMA are available here.

NOTE: Rooting your phone will most likely result in loss of warranty.