I am running Windows 7 64-bit on an HP Pavilion dm4 1265dx.
Tonight I was going through and editing pictures I took on my Nikon DSLR. It was working fine until all of a sudden my card reader crashed and wouldn't read the 8GB Sandisk SDHC card anymore.
I tried restarting but my computer wouldn't start up again unless I took the memory card out of the slot, as in the "Starting Windows" screen played but the sign-in screen wouldn't come up until I took the card out. It has repeated this performance at least 3 times since then when I've tried rebooting for various reasons in trying to fix this, I always have to take the card out before it will start up. Normally if I'm not using my camera I just leave the memory card in the card reader and my computer will start up without an issue.
When I insert the card into the card reader, it plays a sound that means it recognizes a new device has been inserted but autoplay doesn't come up. If I take the card out it makes the device removed sound. Also, while the card is in, it has been causing performance issues with my computer as well; Chrome crashes often, Control Panel is extraordinarily slow, and my Symantec virus protection tells me that it is turned off even though I haven't turned it off.
When I insert the "bad" card into my camera, it says that the card may be damaged and to insert another one. I was just using it earlier tonight to take pictures!!! None of the prongs are bent and the lock slide isn't in lock position.
What I don't get is how it can be working fine for months and be working fine tonight and then all of a sudden be unrecognizable. What should I do? I have a lot of important pictures on this card but I would really rather not send it to a data recovery place...