我試用過以下兩種方試,但都没有成功,
1.Open [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Media Center\Service\Video\Tuners]
Within that key is another key named DVR and another named something like {A799A800-A46D-11D0-A18C-00A02401DCD4}
It will look like this

-Tuners
-{A799A800-A46D-11D0-A18C-00A02401DCD4}
-{04CBCD6F-0EFE-4E52-9209-43B6AC9D4217}
+TuneRequest
+UserSettings
-{54B4E960-C8E5-42A2-AC64-98A586B7BEA2}
+TuneRequest
+UserSettings
+DVR

Export {04CBCD6F-0EFE-4E52-9209-43B6AC9D4217} it wont be named that but its the top one, save it to the desktop named top.reg
Export {54B4E960-C8E5-42A2-AC64-98A586B7BEA2} it wont be named that but its the bottom one, save it to the desktop named bottom.reg

Delete both of those keys and it will look like this.

-Tuners
-{A799A800-A46D-11D0-A18C-00A02401DCD4}
+DVR

Close Regedit and Open the device manager
Open sound, video and game controllers, Disable Your TV cards

Shut down, and install your new capture card, then restart. If your card is already installed Reboot anyway.

Start MCE, and go to settings > TV > Setup TV Signal
Run through the setup process for your tuner, and guide.
Make sure it works and is not stuttering.

Close MCE

Open Regedit, and you should see this.

-Tuners
-{A799A800-A46D-11D0-A18C-00A02401DCD4}
-{BAF147BF-2181-466D-96FE-48020D0861DD}
+TuneRequest
+UserSettings
+DVR

Expand the keys make sure the keys are filled out.

-Tuners
-{A799A800-A46D-11D0-A18C-00A02401DCD4}
-{BAF147BF-2181-466D-96FE-48020D0861DD}
+TuneRequest
Components
Tuning Space
+UserSettings
Components
Tuning Space
+DVR

Export the key {BAF147BF-2181-466D-96FE-48020D0861DD} save it as new card.
Restart Your computer now.

Open Device Manager
Open sound, video and game controllers, Enable Your TV cards

Import the Registry Entries you exported
Double click on both top.reg and bottom.reg and say yes to import them.
Reboot

Open Regedit, make sure your on these keys

-Tuners
-{A799A800-A46D-11D0-A18C-00A02401DCD4}
-{04CBCD6F-0EFE-4E52-9209-43B6AC9D4217}
+TuneRequest
+UserSettings
-{54B4E960-C8E5-42A2-AC64-98A586B7BEA2}
+TuneRequest
+UserSettings
-{BAF147BF-2181-466D-96FE-48020D0861DD}
+TuneRequest
+UserSettings
+DVR

All off the keys should look alike. The settings within will be slightly different.
Close Regedit

RESTART one last time.

Start MCE
Start recording
Change the channel
Start recording
Change the channel
If that worked you now have 3 working tuners

2.算是修改Media regestry吧?
The values for RecordOrder / RecordPrefered / WatchOrder / WatchPrefered created during section 5 are:
Digital TV Antenna A 0 / ffffffff / 1 / 0
Digital TV Antenna B 1 / 0 / 0 / ffffffff

For 3 tuners enter/edit the values to the following:
Digital Antenna A 0 / ffffffff / 2 / 0
Digital Antenna B 1 / 0 / 1 / 0
Digital Antenna C 2 / 0 / 0 / ffffffff

For 4 tuners enter/edit the values to the following:
Digital TV Antenna A 0 / ffffffff / 3 / 0
Digital TV Antenna B 1 / 0 / 2 / 0
Digital TV Antenna C 2 / 0 / 1 / 0
Digital TV Antenna D 3 / 0 / 0 / ffffffff

For 5 tuners enter/edit the values to the following:
Digital TV Antenna A 0 / ffffffff / 4 / 0
Digital TV Antenna B 1 / 0 / 3 / 0
Digital TV Antenna C 2 / 0 / 2 / 0
Digital TV Antenna D 3 / 0 / 1 / 0
Digital TV Antenna E 4 / 0 / 0 / ffffffff

希望大家給點意見吧................