Here is the data sheet for your processor - it has VT-X support but it may need to be enabled:
http://ark.intel.com/products/85214/Intel-Core-i7-5500U-Processor-4M-Cache-up-to-3_00-GHz
When I reboot my Windows machine, there is a prompt to enter the BIOS or Setup menu - I have to press F10
within a few seconds of the prompt and then a menu appears. Look for the VT or Virtualization option. In some
cases it can be found by navigating through the menus as follows:
Security > OS Security > Intel Virtualization Technology
Try to reboot your machine and see if such a prompt appears. If not, there will be another way to do it, will have to read up.
There are lots of youtube videos and posts on this topic, e.g.:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=100394...
and
https://www.youtube.com/watch?v=CbthSKoVF-U
