Download Android ICS 4.0.3 Stock Firmware for Lenovo A376 smartphone from here or here. Download another Lenovo firmware from here.
Archive name: Lenovo_A376_4.0.3_20160928
Archive file size: 316 MB
Model: Lenovo A376 smartphone
Platform: Spreadtrum SP8825
Build number: sp8825eaplus-user 4.0.3 IML74K A376_S018_130827 release-keys
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.