For the last week or so Minecraft has suddenly began to hang/freeze for anything from a few second to a few minutes. When minecraft is loading it becomes "not responding" for about 30 seconds during the mojang splash screen. Once loaded it will hang again when I try and select a menu option. Once in game opening my inventory for the first time again causes it to hang. It will continue to hang now and then while playing.I have checked my drivers are all up to date.I have made a fresh install of minecraft, still same problem.I have uninstalled then reinstalled Java, still same problem.Minecraft doesn't crash so there is no crash report.Using windows 7, AMD 4 core processor, 8GB Ram, Radeon 560 (more detailed specs on request).Anyone got any suggestions?