That's little to go on.... But i use WinDV, and Studio 8 (Gold) Both are easy to work with, and Studio 8 renders good quality.
i mostly capture music videos and some tv shows and vhs tapes, i usally use virtual vcr but it looks like crap when i set it to anything above 352x288 it mite be my card though i have a alvero dvd ez maker card.
Just did a search to see what a "Aver dvd ez maker card" realy is, (Avero did not give anything...) Well..... for $25 you shouldn't..... expect too much, but you are in luck! you didn't waste too much money, in general, forget analog capture cards, Do it "the box way", best is ADVC300, it has extra picture stabelizing features, but the ADVC100 will also do, it captures to DV AVI, (like what comes out of a MiniDV camera) and you connect this box, to your Firewire port, or you buy a (non Texas Instruments)cheap PCI add on card if you haven't got a Firewire port yet. Or buy the latest All In Wonder ATI video card (AGP) but expect a lot more "work" to do, and less quality.. Evaluate your "need", and money you want to spend..
btw. checkout what ADVC100 users say about it, I've one myself, and i like it... Other brand boxes may give audio sync problems... The Canopus products have this "locked"