Thanks for the heads up about your problem re-installing Vista. I think you probably have the same Vista version that I have and your experience is exactly what I am trying to avoid and why I haven't tried any of the many forums' suggestions which involve flushing, editing registers, complete re-installs, etc. As you might guess, my expertise (as far as Vista) is in searching databases, finding successful solutions and then applying known fixes, but avoiding all speculative or "iffy" trial and error!
Have you posted on any other forum besides this one? Vast majority of all forums I've accessed do not apply to Vista and none apparently apply to my "early edition 2006" 32-bit Vista. One poster (Vistaar) on the Green Button site http://www.thegreenbutton.tv/forums/viewtopic.php?f=93&t=9155
has tried a lot of different methods but unfortunately I think his Vista is the "next edition 2007" (which became Windows 7) for which MS offered the TV Pack update but for whatever reason it didn't apply to the earlier edition. So, apparently us early Vista owners can't install TV Pack, or as yet, I haven't found anyone yet on any forum who has been successful in installing it and getting the new EPG. Vistaar's suggestion to backup the entire OS system before trying it might have worked for you to be able to re-install your Vista system but probably not any help to get the new EPG.
I hope to find time this week to check with Hauppauge about their WinTV v7.2 cd and advice about using TitanTV as the EPG.
We need a way to combine all the many forums I've read about WMC and EPG into one big complaint forum so Microsoft can see how many people want to keep WMC, including using it on Vista which will not be supported after next year. Many users like me (a "cable never") use it for reasons other than a free way to stream videos (a "cable cutter") or a DVD player.
Microsoft is portraying WMC as obsolete, that it is being used primarily by people for only DVD and cable streaming use, and that Windows 10 and XBox will include features to replace those 2 uses. They are refusing to recognize there are hundreds of thousands (Millions?) of us OTA users who don't want/can't afford cable and pay for view, and who are using other functions of WMC every day which won't be available in Windows 10 and XBox.
I am one of those "nevers"; I've never had cable, don't want cable, and will continue to watch only broadcast (free) channels. The reason I bought my Vista Media Center TV PC in January 2007 was WMC's ability to pull in OTA broadcast TV and be able to watch live TV, record programs, play DVDs, music, and radio, all while using my computer. My original monitor had a 22" screen and WMC allowed me to resize the TV image from full screen to smaller than postcard-size screen so I could do all my computer work and watch TV at the same time on the same screen.
This makes WMC perfect for multi-tasking and now it's even better after my 22" monitor died because I replaced it with a 32" Vizio TV with computer input and simply connected it to my Vista! I often use WMC to track TV weather maps/warnings and favorite TV shows in a corner of my screen while I'm checking email or using other software, or conversely, if I'm watching my favorite TV show through WMC, I can have a web-accessed stock market chart, Email, or Google search running on screen at the same time as WMC running my favorite TV program in a reduced window, plus I can be recording that program just in case I get called away from the screen or distracted by computer work. The built-in feature of closed captioning on WMC has been a godsend if I can't understand something being said on TV; I can just rewind and "Mute" and closed captioning appears - although sometimes I get some extremely funny spellings and wrong words being captioned!)
Of course, the schedule and recording part of WMC became very unsatisfactory after the EPG switchover, since now I can only do manual setting to record one interval at a time so I have to find a programming guide for times and channels. That's another great feature of WMC - I can resize its screen so I can access TitanTV website, resize it on one side of my screen and resize WMC screen on the other so I can see both screens at the same time, making it a little easier to set up manual recording.
If there is any other program out there that can do all that WMC does, and as easy as WMC has been to use before this EPG switchover disaster, please let me and the many other frustrated soon-to-be-dumped WMC users know. There's a ready-made market for it!