Hi everybody ! i got a Sony Handycam HDR-CX6 since 6 years and i was always importing my .MTS with iMovie on my iMac before editing with Premiere Pro CS4-5-6 (depends to years )

So, the fact is i bought an ultra performing Lenovo laptop one month ago, because i wouldn't ever give more money to Apple (despite of great OS ), and now i don't know how to import my videos on windows . I don't know a lot of things in video edition (compression, interlacing etc ... ) but i think the problem is not far away from that stuff : when i read an MTS file or to premiere, or when i try to convert it (with tiny apps, often sh***) the video quality is weird, there's some horizontal motion stripes ! when i import the same file in imovie it's OK ...
If you don't know what i mean, i could try to upload a sample ...

So, did somebody know how to fix that ? maybe suggestions ?

Thanks for your attention, and have a nice day

PS: Please excuse my poor english witch is not my main language ...