I seem to have an similar problem. And i would really appreciate an repaly to my problem.
MY SYSTEM:
2 WD VelociRaptor® 300GB SATA 10000RPM, 16MB, 3 GB/s - I RAID 0
2 Western Digitial Caviar® Green 2TB SATA2, 7200RPM, 32MB, 300 Mb/s
1 Corsair HX 1000W PSU ATX 12V V2.2, 80 Plus, Modular, 6x 6+2-pin PCIe, 1
1 Cooler Master HAF 932 Big Tower Sort Vifter: 1x 230mm Front, 1x 230mm Topp, 1x 230mm Si
1 Intel Core? i7 Quad Processor i7-920 4,8GT/sec, 8MB, Boxed
1 ASUS P6T Deluxe V2, X58, Socket-1366 DDR3, ATX, SLI&CrossFireX, Firewire, 2xGbLAN, 3xPC
1 Noctua NH-U12P SE1366 CPU Fan Socket 1366, 19,8 dBA
1 Arctic Alumina Termisk Pasta 1.7 Gram Gram
1 Sony NEC Optiarc DVD±RW burner AD-7243S LabelFlash, Multirecorder(Ram), DVDRW 24x, SATA, B
1 USB2 multikortleser 3.5" sort for CF I/II,MMC,RS MMC,MMC Plus,SD,SDHC,miniSD,microSD
1 Microsoft Windows 7 Ultimate NO OEM, 64bit
1 Corsair XMS3 DDR3 1333MHz 12GB CL9 Kit w/6x 2GB XMS3 modules, CL9-9-9-24, for Core i7
1 Logitech G15 gaming tastatur USB, Norsk Layout
1 ASUS Radeon HD 4890 1GB GDDR5 PCI-Express 2.0, 2xDVI-I, HDMI, HDCP
Windows: 6.6.7600
64 bit
clean install
no dual booting
Maybe MY problem happened after installing: "Replay Capture Suit"e from Applian Technologies Inc., but I am NOTsure. It was after this install i got aware of the problem, anyway. But I hadnt use the WMP mouch before this.
THE PROBLEM:
I have .m2ts files (HD) from my HD Camcorder saved to harddisk. With my old XP-pc I couldnt preview these files in Explorer. And everything had to be done through Pinnacle Studio, but after installing a new PC with win 7 x64 I can now se pictures where there earlier was only icons for every .m2t-file and preview them. Wich is really nice!
In the preview window the file plays fine!!, with sound and video running, BUT when I try to start the same file in WMP 12, or doubleclick on it (which makes it start in WMP too) the sound is only noice???
The files plays nice in Pinnacle, and in Windows Movie Maker.
The WMP 12 play most (all) other files ok.
I have been to the ""Control Panel > Default Programs, select Windows Media Player and there is 52! defaults - It wont let me change anything - all grey, and says: "it has all the defaults""
I have tried to Control-panel -> Select Windows Program -> deselected WMP 12, rebooted, and took it back in again, same result.
No problems in Device Manager.
Only thing I THINK (not sure) I notice is that when i try open WMP it opens first the Library-window and THEN opens the player-windows in very small size. And I cant remember if it did this like this earlier. So I have this strange feeling some wrong version or smt. is opened when WMP 12 is activated now.
I say the previous since I read this from another user in the "sevenforums":
"What I have noticed is that when I double-click an AVI file in Explorer, it opens using the 32-Bit Windows Media Player, but when opened in the Preview Pane, then the file opens in the 64-Bit Windows Media Player. I'm going to try using REGEDIT to fix this, but until then, does anyone else perhaps have a solution to force AVI file to open with 64-Bit WMP?"¨
This users remark is the closest I have come so far to an soultion; maybe when I open WMP it opens a "wrong" type of WMP (32 / 64 bit problem??), but when the files are played as an prewiev in Explorer it seems to get it right.
One more thing: when I deactivated WMP earlier the preview window in explorer also stopped working. But I think I read somewhere that the program that makes the preview is not the same as WMP? But clearly those are linked, or the very same function.
I sincere thanks to all who help me with answers