I built a computer last year and a month or two ago I upgraded to Windows 8. Since I've upgraded it, at random times, while moving my mouse, it would move extremely slowly for about ~5 seconds. After the 5 seconds are up, it would resume normal speed.
Furthermore, Chrome also has an issue where it will randomly freeze and I cannot do a thing about it unless I force close it.
I cannot replicate these issues at all as they happen at random times and have only happened after I went from Windows 7 to Windows 8.