Originally Posted by thomas
The message comes from Window, so it is a Windows problem and has nothing to do with HDToolbox.
Make sure that no anti virus software is running which protects boot blocks from being overwritten.
Try this to remove any Windows traces from the CF card: http://eab.abime.net/showthread.php?p=627622#post627622
If it was an antivirus program, then i would get an error from that program. but since it's a windows program, it seem like there is a problem writing to the card in overall. don't you think so?