My computer will not read a standard 2GB Kingston SD card. Will put in other computers reads fine. Its an SD4 card. Computer is 6mos old. Windows Home 7 Premium, Processor 2.70GHz, Ram=5.75GB usable; 64 bit Operating. Thank you for the help.

How are you accessing the SD card? Built in card reader? Look for the card in Windows Disk Management. Report back with what you find there.
What happens when you try to access the card?
See the link below for help with SD4 files.
