Some time ago, my laptop was infected by some worm/virus, which also spread to my USB sticks and my DSLR's memory card. All photos on the memory card were shown as 1kB files, without a possibility to open them. I dropped all memory cards and USB sticks, and also re-installed Windows on my laptop.
Just a few days ago I bought a new memory card for my DSLR and made some shots. As soon as I plugged the memory card in my laptop, a virus alert popped up, and all files on the memory card were again shown as 1kB files.
The weirdest thing is that the new SD card was not used before, it came just from the wrapping. What makes me more puzzled is the fact that the new SD card at first was tried on my girlfriend's laptop which is running well (no virus issues detected).
Could someone tell me what could be the problem? The DSLR? It does not seem likely to me, but right now I have no other guess.