Firstly to get to the C:\Windows\system32
first go to start then computer
then click you C:\ Drive usually the first Hardrive
Now double click the Windows folder
Then scroll down till you see a system32 folder
Now your are in C:\Windows\System32
As for extracting, Extracting is were you unzip a file in a Zipped file or a .rar file and move it to a specific place as in your case to move it to C:\Windows\System32
You may need WinRAR to help extract this see
WinRAR (32-bit) - Free software downloads and software reviews - CNET Download.com for more details
Hope this helps,
Josh