I have a student copy of solidworks 2016, it worked fantastically for about a month then all of sudden it was slow. It opens up quickly (3-5 seconds). If there is no assembly, part, or drawing up it responds normally. When I try to make a small part it has about 5 or 6 seconds lag between actions. I am running solidworks on an Acer Aspire v-17 nitro. Running it on windows 10, i7-4720HQ 2.6GHz processor, NVIDIA Geforce GTX 860M, 16GB ram. The file location is stored on the computer. Nothing on the computer has changed since I first used solidworks (when it was fast and responded normally).