im not using the latest updated win10, my specs are a core2duo 2.6ghz, 4gb ddr2, GF 7950GT, SBlive, which i use for recent DX9 games, for internet browsing it works fine.
main thing is you want plenty of ram, 2GB is minimum requirement for a 64bit Os, or at least it used to be, imo you'll want 4GB ram at the very minimum for it to be decently usable, as its said a modern web browser can eat up to 4gb ram, tho i mainly use win7 for browsing with chrome and an older version of firefox due to newer versions not supporting certain add-ons, ive usually got 400+ tabs open in each at the same time, firefox doesnt respond sometimes either waiting or restarting firefox sorts it out, chrome seems to be ram hungry as after a while it eats into the paging file and i notice my hdd space decreasing until i reboot, also using an SSD is a good idea, using an old HDD is gonna slow things down especially if you are using older hardware like me.
i also tried win10 x64 some years ago on a single core 3.46ghz running on SSD, with 1GB ram, it was slow as shit and pretty much unusable, with 2GB ram its just about usable for browsing the internet, listening to music, watching videos and thats about it.