Sean’s WMC Backup

Windows 7 Media Center (32bit/64bit)
Windows 8 Media Center (32bit/64bit)

Stand-alone .exe, No installing!
Back-up/Restore your recording schedule
Back-up/Restore your channel lineup (experimental, may or may not work)
Query your list of recordings
Quick and easy

Advanced features –
Force Guide update
WMC Factory Reset
Adjust Live TV Pause Buffer
Adjust Skip Ahead Interval
Adjust Instant Replay Interval

If you are looking for a tool to modify your tuner/channel lineup, checkout 1geek1’s Guide Tool