Just use the easiest solution. Download SMplayer, set the cache large enough (you can go to 25000kb even or more) and try with that. Definitely fixes your problem. (Download the portable 7z version, no need to install it.)
Explanation. Mplayer is a very versatile and awesome player. SMplayer is a frontend for that. You can replace the in-built mplayer (which comes with smplayer) with a few clicks (for better performance. And you can use the 'ffmpeg-mt' version.). Grab your copy from the linked site (ffmpeg-mt is using the multi cores also), place it in the unzipped smplayer folder. Open SMplayer and select the mplayer binary in the options.
Other solutions are using TeraCopy or Total Commander. (You can specify the transfer speed or pause it.)
If the performance is the problem. Install CCCP pack , launch Media Player Classic HC and go to settings. There, go to Internal Filters and on the far right column, select the H264/AVC(DXVA) and the VC1(DXVA) ones. Close mpc-hc and start your movie with it. If everything is OK, you should be able to play it without a problem, and mpc-hc switches to "Playing[DXVA]" at the bottom.
NOTE: This works with ANY video card. However, you can also use CUDA acceleration with NVidia cards. You need a 8600 or higher NVidia card for that, and a "CoreAVC" codec. (Its proprietary, not free, however its the best.) Buy it, install it, launch Start -> Combined Community... -> Filters -> ffdshow video configuration. Go to
Codecs at the left and at the
H264/AVC, select disabled instead of the "libavcodec". (mpc-hc lets you use ffmpeg-mt also as you can see it here). Restart your mpc-hc/playback, there you go. :)