Networking :: Network File Transfer Slow ?

Ok, the only thing I remember doing is changing out my hard drive because it went bad. I swapped in a new one and reformatted with Windows 7. (I can hear the boos and hisses as I type) Anyway, now file transfers are exceedingly slow. They are ~10KB/s when they should be ~40MB/s. The odd thing is that it mostly occurs on large files, but not all large files and sometimes smaller files are affected. Copying files from one hard disc to another on the server, as well as copying from the server to Win7. Local files are not affected. The problem does not occur on my laptop which has Slackware Linux on it.

Another thing about the problem is that when I mount a disc image on a virtual drive, access time is very slow and windows explorer is very unresponsive and often locks up completely.

I have a samba server with Slackware Linux on it and a Windows 7 client. DHCP is configured through dnsmasq. (dhpc-host=<mac address>,<computer name>) Every now and again, dnsmasq seems to conk out when I try to access the network with my Win7 machine. I then have to reboot the server, as my only access to it is via SSH and I don't have a video card in it. After the server reboots everything is fine until accessing the network with my Win7 machine conks it out again.

I've tried different MTU settings, different network cards on the Win7 machine(Dlink and realtek), various regedit hacks, but none of them produce any results.