Below is the direct link to download the Micromax AQ4501 Stock 
firmware(flash file) from GoogleDrive.Firmware contains flash tool, 
driver and instructions.
DOWNLOAD:
Micromax_AQ4501_V2_19.12.14.zip
Micromax_AQ4501_V9_29.08.14.zip
Micromax_AQ4501_V3_23.03.15.zip-Lollipop
HOW TO FLASH:
 
DOWNLOAD:
Micromax_AQ4501_V2_19.12.14.zip
Micromax_AQ4501_V9_29.08.14.zip
Micromax_AQ4501_V3_23.03.15.zip-Lollipop
HOW TO FLASH:
 Step 1: Download and extract the stock firmware on your computer.
 Step 2: After extracting you will find the SP Flash Tool, Driver and instruction manual.
 Step 3: Install the USB Drivers (skip if drivers are already installed).
 Step 4: Open the SP Flash Tool and load the Scatter File from the firmware folder.
 Step 5: Connect your Smartphone to the computer using the USB Driver.
 Step 6: Click on Upgrade Download Button in the SP Flash Tool to Begin the Flashing.
 Step 7: Green Ring will appear at the end of successful Flash.

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