I am using Windows 7 RC as my primary operating system right now, and my dad just pre-ordered the Windows 7 Home Premium upgrade because Vista is too malfunctiony to work. I am having an issue with the Media Center in Windows 7, particularly the TV guide.

In Windows Vista the TV guide works fine and periodically downloads data every 3 days or so. In Windows 7, data hasn't been downloaded for over a month. All my channels say "No data available". Without the TV guide, Media Center won't record anything because it doesn't know when the shows are on. I am in Canada, using Shaw Cable as my TV provider with analog TV (if that helps).

Is there a file I can delete to reset the TV guide function or what can I do?

You can manually download the Guide in the Settings section under Tasks. Under TV, press Get Latest Guide Listings. If that doesn't do it, reset up your guide, the system will overwrite the old guide data.

xboxrulz

It prompts me to download guide listings, and when I manually try to download them it says that they are already downloading, but it's been weeks and the guide is still "No data available".
I also tried setting up the TV again (choosing a cable provider with the postal code), but the wizard freezes when it says "Download more information to continue setup...".

first of all, just re-try, it could be a hang-up problem with no retry-after-timeout in the setup script.
Secondly, could it be a firewall settings joke ? Just try shutting down the firewall during re-install (I guess stopping the firewall is not so easy with Windows7).
And it could be a funny behavior of your anti-virus too...

I have tried several times now with no luck. I have disabled Windows Firewall and AVG Anti-Virus, it did not make a difference.

Never used windows 7 before, so I think I can't help you lot. But, are you using proxy? Have you checked your connection? I mean, are you able to connect to TV guide provider (try pinging it)? Have you checked the regional setting in control panel and in MP configuration. You might also checked your time and date setting etc.

I don't know what the TV guide provider is so I can't ping it/check the server.
My proxy is http://proxy.vc.shawcable.net:8080/
My regional settings, date and time are set correctly. In Windows Media Center, my region is set to Canada, which is correct.

Did you checked the network connection setting in Winblows Media Center and Internet Explorer? Try to check them, maybe that's the cause.. (at least i hope it's just as simple like that ;p)

Internet Explorer works fine, and the TV guide provider loads fine as well when accessed within a browser.

I have tried disabling the proxy and using it and it makes no difference.

So I am planning on finding something for my daughter's used PC... I don't know if I will be able to do anything with Windows 7, but maybe I will have to give it a try. And with that maybe even try the Media Center... unless it is having a lot of those issues.