for both uses lodi, use windows 10 ghost spectre installan mo nalang ng MS office apps dun sa toolbox kit na kasama ng OS
pero prefer ko kase for gaming LANG talaga eh mag windows 7 gaming build para kabigatan sa processor pati ram, pero don't expect such games na latest (like NBA 2K17 and so forth) medyo kababaan lang kase specs ng laptop mo lodi eh at di gagana yan diyan sa win 7
I used win 7 lite version (basta parang ganun, nakalimutan ko na yung mismong name build) on my old pc almost the same specs as yours, and it works almost without lag in some oldie games like cod modern warfare series 1 to 3, NBA 2K14 pababa, counter strike source and so forth