I updated my laptop (Dell latitude E6230, i5-3320M @ 2.6 GHz, 4GB RAM) from Win 7 (enterprise, 64 bit) to Win 10 (pro, 64 bit), at the same time switching from version 2012b (if I remember correctly) to 2015b. After this, a code (entirely numerical calculations for kinetic charge transport simulation) that used to take a few (2-3) secs per evaluation now takes around 10 secs for the same job. I checked that there is no memory overflow, nor are there other apps overloading the processor. This seems too much to be due to heavier load of Win10 on processor. Any suggestions what this might be due to?