Hi jack
I too had same problem with my black magic design decklink hd extreme
I tried the latest drivers also I tried the latest vista sp2 update
I also upgraded ppro 4.1. Even then I could not capture file in ppro capture under blackmagic. When I tried to import files captured with Media express Ppro will not allow to scrub the file showing import server process.exe and stop
If you come to know how I solved the problem you will laugh to your hearts content.
To capture files just do not create folders – do not have partitions in yr capturing hard disc do not capture more than 70% of hdd space
just capture with a file name in secondary drive C;/ you will have os and software one more drive D;/ where you capture
try this your system will work like honey
thanks
kirubagaran daniel