macbook pro – Windows Explorer stopped working after connecting external display (monitor) to My Apple Mac Book Air 2011

Earlier i was using Window 7 32 bit (bootcamp), and i have replaced my new SSD and load the windows 7 64 bit. After installing windows 7 64 bit, i was facing display driver issue due to incompatible drivers automatically loaded after running bootcamp, and intel HD graphic 4000 (version installed. i restarted by laptop, and after restarting black screen was coming, so i copied the display driver (Intel HD graphic 4000 version from my 32 bit SSD and installed the driver. After installing display driver version, i can boot in windows 7 bootcamp and also it is working fine but when i connect external display (monitor) via thunder bolt to VGA port then it is showing windows explorer stopped working and i have to restart the windows explorer then i can see the external display on my monitor. This error coming each time, i connect external display with my Mac.

Kindly help to resolve this issue.