Check if the Intel Mobile Express Chipset SATA AHCI Controller driver is installed by looking at Device Manager (shown below). Install the controller driver from www.dell.com/support/drivers or by inserting the Dell ResourceCD.
This update includes previously unreleased fixes that were made specifically for Office 2013 and Office Home and Student 2013 RT. In addition to general product fixes, these fixes include improvements in stability, performance, and security.
Integration Services is like the "Drivers and Firmware" for your Virtual Machines. If you have moved your Virtual Hard Disks (VHD) to another version of Hyper-V, you can almost always notice the performance degradation in the virtual machines.