you might see a process 'LVpSRV.exe' or something like this that eats 90% of cpu.
Kill it. Don't know what it is, but once killed, windows runs normally.
+#Compile and install tunnel
+cd tunnel && ./autogen.sh && ./configure --prefix=/opt/linphone && make && make install
#run autogen.sh after a git checkout or update
./autogen.sh
./configure --prefix=/opt/linphone --enable-shared --disable-static