I have read but a fraction of the mammoth thread that is
Loosing Channels / Guide disappearing – IceTV and Vista (Possibly also MCE2005), so I'm hesitant to post there when I have a NZ problem and am unaware of all that has transpired in that thread.
My problem is that although I can set up my channels fine, when the guide update runs manualy or automatically I lose my frequencies in VMC. I still have the same 5 channels in the same order with EPG data, but I get static. Using Proccess Monitor I tracked this problem to the update deleting a reg key called 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TV System Services\TVAutoTune\TS64-0'. This has the frequencies for all the NZ channels stored in it, these values being written from a file called mcetuningoverides.xml which is in the eHome folder.
To restore the frequencies I need to run the guide setup process again. Once it has finished downloading the EPG data VMC calls up the mcetuniningoverides file from a reg link ('HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Cu rrentVersion\Media Center\Service\TuningOverrides\XMLOverrideFile'), then writes the correct reg key based on your country code (NZ is 64). VMC then uses this file for the frequencies.
What I want to know is A) are people trying to stop channels disappearing aware of this and is it relevant to there problems B) is there a way to use a program like keepkey to protect the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TV System Services\TVAutoTune\TS64-0 folder so I don't lose my frequencies?