you may have observed that xampp’s apache gave out 500 internal server error when you try to run wordpress on any other script that use apache rewrite module ,
you can get rid of that simple uncomment a line in httpd.conf
if you install xampp in default location c:\xampp
then you can find apache conf file in
c:\xampp\apache\conf
open httpd.conf in wordpad or notepad++ or notepad
find :
#LoadModule rewrite_module modules/mod_rewrite.so
and replace it with :
LoadModule rewrite_module modules/mod_rewrite.so
note # is removed , now just stop apache using xampp control panel and then start it and it will work ,
please post your feedback if this helps.