Error 495

So what i have been doing to my sony xperia z3 to avoid errors is to avoid using my phone while it is downloading to app store (Mortal Kombat X) i putted my screen timeout to 30 min because there was no "never" option but when i finished downloading the error 495 pops up and when i clicked it the finished downloaded file becomes 0% again. Any solutions? i only do this steps when im downloading 1.0gb +. When downloading mb there are not problems at all.