Try one of the Linux variants and you may be surprised! I did so with a Lenovo 3000 g530 and it is doing great running Antergos (rolling release), SparkyLinux (rolling release) is a snappy little OS, and you could also try the latest Ubuntu (long term release) of you want to limit the regular updates of rolling release distributions. Do some googling on the topic and hop on to https

/distrowatch.com/ and give it a go! You might also consider looking into replacing the hard drive in that laptop with an SSD, which will really speed things up for you - best of luck!
https
/www.ifixit.com/Guide/Disassembly+-+Assembly+Acer+Aspire+5315/88734