No. Wrong. What he needs is the Windows WMV decoder, that already comes with Windows. MPC can use this decoder without any problem, and DXVA comes activated by default. The only thing you have to do is to disable all WMV decoders, like FFDShow or MPC internal filter. You should see 'WMVideo Decoder DMO' in the Filters section. But pay attention, because there's a lot of codecs versions inside WMV container, like WMV3, WMV9 and, the last one, VC-1. To decode VC-1 with DXVA you'll need the decoder that comes with WMP 10 (or better), or install the patch. You can use the PowerDVD decoders with MPC, do you know? Just install PowerDVD and check if there's no other decoder for MPEG2, H.264/x264, VC-1 and WMV installed in order to avoid decoders priority conflict. I have a mini package with PWDVD H.264/x264 decoders if you want; only 1.06 MB, and you can install it with two clicks.