How to fix USB2.0 Ser! Driver issue for USB to RS232 Serial Adapter || Windows 8.1 and 10
Driver Name :CH341SER
Most of the download links are in Chinese . Don't worry ! You can download CH341SER from other sources. Just do a google search and download.
If not , try below links.
Link: http://www.winchiphead.com/
Link : http://www.wch.cn/
Link: http://www.wch-ic.com/