Normal
If you have an integrated graphics card it will be really slow navigating in menu i tried it on a laptop with dual core porcessor and it was really slow because of graphics card. I don't think there is a point installing older version as it will have more bugs then newest one. As i understood you want to playback files only (recorded using windows media center) and i think xbmc is another option which you can research. Just try installing MP, configure network shares on windows media center pc and add those shares to MP in mp configuration window. If this is too slow then try xbmc but i personnaly do not have experience with it so just install and check performance.What graphics card do you have installed and how much ram have you got? If your graphics card is ok and ram as well but cpu is struggling and you want to extend life of this pc you could check what processors are supported by your motherboard and buy more powerfull cpu.
If you have an integrated graphics card it will be really slow navigating in menu i tried it on a laptop with dual core porcessor and it was really slow because of graphics card. I don't think there is a point installing older version as it will have more bugs then newest one. As i understood you want to playback files only (recorded using windows media center) and i think xbmc is another option which you can research. Just try installing MP, configure network shares on windows media center pc and add those shares to MP in mp configuration window. If this is too slow then try xbmc but i personnaly do not have experience with it so just install and check performance.
What graphics card do you have installed and how much ram have you got? If your graphics card is ok and ram as well but cpu is struggling and you want to extend life of this pc you could check what processors are supported by your motherboard and buy more powerfull cpu.