I have two question. First, Can someone help me with advice about how to limit and improve the CPU usage on the VMs (hyper-v)? Or maybe you have links about this topic. The other question is about how can I change dynamic VHDs to static VHDs?
On converting VHDS:
Click the Edit Disk action within Hyper-V Manager then select the dynamic VHD. On the Action screen, select the Convert option to make the dynamic VHD a fixed VHD. You should be prompted for a name for the fixed VHD. You'll need space as it copies the contents to a new disk.
Limiting CPU usage. See this article for details. In a nutshell you set limits under the processor tab.