Ok everyone, i'm hear to help you understand your problems a bit more thoroughly. Now on this topic there are multiple factors that are to be looked on upon with this "lag" concept.
One thing to note is that Windows 10 has just came out, so it's very buggy and there's going to be lots of problems. But now that isn't really the issue too much or maybe it is, but if these next things that i'm going to mention are happening to you or your computer has the same specifications that i'm mentioning, then this might be your problem.
So there are quite a bit of things to look at when you think your computer is under-performing or acting up.
1. RAM: Most of you probably have laptops, which is common. Most latops that aren't specified for anything other than internet browsing or personal use such as using emails and social media aren't going to be equipped with the proper amount of ram to play a game at it's best settings. If you go into the Windows 10 home, and type "Control Panel" then "System and Security" then "View amount of RAM and processor speeds" it should show you what you're looking for. You're probably going to have around 3 - 4 GB's of ram which isn't going to do you very good.
2. Processing Speeds: Optimal processors usually have 2 to 4 cores. The more cores, the more workload it can handle. If you're sitting at processing speeds of about 1.8Ghz then this could be an issue as well.
3. GPU: Most of you aren't going to have fancy high tech graphics cards. That's completley normal since they're primarily used for heavy gaming and heavy video editing and rendering. So one other problem is that Windows 10 has new DirectX12 support so you may want to check your drivers.
4. Hard Drive Space: You probably have around 250GB's of storage on your computer, which isn't much at all. So Windows 10 could be taking up quite a hefty bit of that. --------Look Below