Computer Freezing Then Unfreezing Repeatedly?

we went away to a cottage for a week and when i came back and started using the computer it was acting strangely. we just moved to a new house a few weeks back so obviously they had to move my internet. i am not sure whether this is a network issue or a computer hardware issue or software.i do not get any bsod's. i have not noticed whether the computer freezes when i am not using the internet. i will be looking out for a pattern. the screen will freeze, it will not go black it will just freeze, i cannot open any icons on the desktop or do anything on the computer. when i am using Internet it may say the schockwave plugin stopped working, i tried uninstalling the plugins and the player itself and reinstalling but to no effect. it can last anywhere for 30 seconds to five minutes. obviously it is very annoying especially if i am playing multiplayer games.the computer is working right now without freezing and task manager is saying of the 2047 mb of ram, 852 is cached, 833 is available and 16 is free. cpu usage is between 40 and 50% and all i am doing is running chrome for the most part as well as utorrent. i have stopped most of the programs running in the background. it says there are 52 processes in task manager. in resource monitor i see something called deferred procedure and interrupts appearing near the top of the list in cpu consumption but maybe that is normal. i have no idea. also wmpnetwk.exe is running.