Can Download Files But They Are Not Saving

Ive been spending the last few days going between many different support forums of windows 7, kaspersky and also yahoo answers in hope to fix this google-shy problem im having with no luck, replies even.when i try to download any application file (i believe they're most usually .exe file?) it opens the dialogue box and i am able to choose location and the file name. Once i have done so it sits at the bottom of my chrome browser until it shows the download is complete. once i click on it, it gives me the standard windows message ''windows cannot find (file pathway and name). make sure you typed the name correctly, and then try again''.So I tried internet explorer, i click on the completed download/or even try to open the containing folder and the same error msg crops up again.I changed file locations, even onto a different internal hdd and also i changed the file name before saving, no success.I figured it must be being seen as a virus by my kaspersky (windows defender is switched off btw) but couldn't find anything that seemed out of place to me (but then im certainly no expert with security programs because i just leave them to do there thing).

It was suggested i get hold of the kaspersky's getsysteminfo.exe (being an application i downloaded it onto a friends pc and brought it over via a usb) to send usage, spec and settings report which i did but unfortunately never got a reply from the forum. i looked at the report myself, with little clue what is normal or not... i convinced myself with a little googling that it was the 'nVidia forceware network access manager' causing the problem, i didnt even know i had such a program and it turns out to be a firewall 'software/hardware(!) thingy' i guess as part of my nvidia 680lt motherboard. so i uninstalled it and with that came no success either.btw i forgot to mention files such as jpegs, docs, music andvideo files work fine, i can download them no problem without the file going missing, yet any file for a program such as google drive or getsysteminfo or whatever and my pc doesn't want know.can a registry problem effect one type of file and the resulting behaviour, is it a virus even -kaspersky doesnt think so though.