The default location of Windows temp folder is at Documents and Settings/{your account}/Local Settings/Temp.
It is shamefully set to not appear in Windows Explorer until you enable showing of hidden files and maybe even to show Protected System files... I'm not sure of this one, it's been a long time for me.
You can change the system temp folder location.
Make a new folder in your system drive... C? and name it Temp.
Do this:
Start>Control Panel>System>Environment Variables (button)>User Variables for {your account name}/ and click on the first one "TEMP" and click "Edit"
In the text box that appears, change to the path to the new Temp folder you made earlier, and do the same for the second one "TMP" to make both go to the same new folder. Click OK and from now on, the temp folder is handy to find and to empty once in awhile.