I recently got a PCMCIA CF Card reader for my laptop. I'm running Win 7 64bit and whenever I try to read or write files to my CF card the system slows to a crawl, with the cursor dragging across the screen and applications not responding etc. The processor jumps to 50-100% and the system generally slows to a complete crawl until I kill explorer as cancelling the file transfer has no effect.
The CF card is a Sandisk one rated to 20MB/s and works very well in my camera, easily writing 10MB+ RAW files even when shooting rapidly.
If anyone has any thoughts or experience with poor PCMCIA performance in Win 7 it would be very much appreciated. For reference my laptop is an Asus G1 (2ghz C2D, 4gb ram) with a Ricoh R/RL/SC476 controller.