CYaBro:RustyGonad: Its 2010 - analog should be dead and buried.
Two cheap DVB-S tuners, One $50 card reader, and $43 worth of DVBLink TVSource - you could/should cure the problems forever. Let alone getting rid of a mess of decoders, cables, missed channel changes, crappy analog picture, lack of 16:9 support etc etc etc. You've probably wasted twice that in time already trying to cure it...
Nothing in Windows 7 is designed for analog anymore... There's plenty of "stuff" in there designed to protect content which may be causing the issues.
You have to have the correct Sky card for that to work don't you?
Also they have two Sky decoders so will it work with two card readers?
Yes - you need 45XX series card(s).
Yes it will work with two card readers if you want. You could easily allocate one reader to each tuner.
Or you could just do what everyone else does, and run all the tuners off a single card :)
Believe me (I ran analog using a PVR150 in MCE for a few years as well), once you've set everything up the "digital" way, you will never want to look at another analog system ever again. The only disadvantage is the learning curve, if your installing customer systems, this would be more of an training investment anyway.