How do you check if your computer supports Second Level Address Translation?

Second Level Address Translation (SLAT), also known as nested paging, is a hardware-assisted virtualization technology which makes it possible to avoid the overhead associated with software-managed shadow page tables.
Intel's implementation of SLAT is known as Extended Page Table and is available for Intel Core i7, Core i5 and Core i3 procesors.
The computer used here is Windows 10 Pro from DELL and seems to have Core i7.
How do you check if the machine is SLAT capable?
You download this tool from CodePlex.
MachineSLATStatusCheck from here:

http://slatstatuscheck.codeplex.com/

You get a zipped EXE file; CheckSLATStatusOfMachine.exe (6.45KB)
Extract it and run and click check and immediately you get a response as shown (for this Dell machine).

SLATCheck

What is a hardware-assited detection tool and how to get it?

If you want Windows Virtual PC  you should have processor in your computer which is capable of hardware-assisted virtualization. Also in your BIOS you should have HAV turned on for the following: AMD-V™, Intel® VT or VIA® VT. This is because if your computer does not support HAV, then you cannot run Virtual PC. This is the first step for running windows Virtual PC.

Microsoft has a tool to check this called havdetectiontool.exe(180 KB). The tool not only checks this but also finds whehter it is enabled in the BIOS.

You can download this tool from here:

http://www.microsoft.com/en-us/download/details.aspx?id=592

Supported platforms:
The HAV detection tool ONLY supports the following operating systems and editions/versions:

• Windows Vista Service Pack 1, 2 (Home Basic, Home Premium, Business, Enterprise, Ultimate)
• Windows XP Service Pack 3 (Professional), Windows XP Service Pack 2 (Professional)
• Windows 7 (Home Basic, Home Premium, Professional, Enterprise, Ultimate).

I checked this on my Toshiba Satellite P775. Here is the result from running this executable on the Windows 7 (x64) Ultimate.