Bitcoin is getting popular in india these days but now a single bitcoins price is higher than a average indian's one month's salary so most peoples are buying small amounts only.
however, currently I don't want to change my passwords because I'm not sure if there's any malware on my computer.. that's what I'd like to know
Well you can download avast or sophos Antivirus and scan your pc but i doubt your pc is infected. I am sure your id/password got leaked from some rouge site or you did login on some unsafe pc.