windows 10 : No such file or directory: 'query_results.xml' and 'aria2c' is not recognized as an internal or external command

[barry2015]

I download the codes of Sentinel_download and try it in windows 10,I have installed aria2c,but I run into questions,it doesn't work in windows 10?What's the solutions?
C:\sentinel2_python_erdas\Sentinel_download_by_python>python ./Sentinel_download.py --lat 43.6 --lon 1.44 -a apihub.txt -o 51 --id 2016-11-01 --if 2016-12-01 --downloader aria2
aria2c --check-certificate=false --http-user="guest" --http-passwd="guest" --continue -o query_results.xml "https://scihub.copernicus.eu/apihub/search?q=footprint:"Intersects(43.600000,1.440000)" filename:S2R051 ingestiondate:[2016-11-01T00:00:00.000Z TO 2016-12-01T23:59:50.000Z] producttype:S2MSI1C &rows=100"
'aria2c' is not recognized as an internal or external command,
operable program or batch file.
Traceback (most recent call last):
File "./Sentinel_download.py", line 282, in
xml=minidom.parse("query_results.xml")
File "C:\Python27\ArcGIS10.5\lib\xml\dom\minidom.py", line 1918, in parse
return expatbuilder.parse(file)
File "C:\Python27\ArcGIS10.5\lib\xml\dom\expatbuilder.py", line 922, in parse
fp = open(file, 'rb')
IOError: [Errno 2] No such file or directory: 'query_results.xml'