Hello and welcome to Techspot.
2 minidumps crash at HSF_CNXT.sys. This is your modem driver. Try updating the driver and see if that helps. If not, try a different modem.
2 minidumps crash at ntkrpamp.exe. This is the Windows nt & kernel system file.
It`s possible, you have a ram problem as well.
Go HERE (
http://www.techspot.com/vb/topic35103.html) and follow the instructions.
Regards Howard :wave: :wave: