I've connected my camcorder to the pc via firewall,driver was also installed but when I plug in and out nothing happen. (Except the sound). Do i need any software?
DVIO, https://www.videohelp.com/software/DVIO, will capture from the camera into a raw AVI file. No re-encoding, the file contains a perfect digital copy of the data from the tape. Last time I used it was on Windows XP machines, not sure about the current compatibility - but it's worth a try. The download is small, and it's free.
Otherwise, as Stephen suggests, try a trial version of one of the commercial products. Adobe OnLocation also always did a good job of this, but I've not used that in a while either, I just haven't been using MiniDV tapes.
Once you have the tapes digitally downloaded into files, you can re-encode with something like Handbrake, if you want some smaller files that you can use for viewing. I would just keep/archive the original tape download files in case you ever need to go back to the originals.