Fatal Error: Out of memory

Stop DesktopServer and it's services. 

Go to File Explorer and to c:\xampplite\apache\conf
Edit the httpd.conf file with your favorite text editor 
Scroll to the bottom where you will see

<IfModule mpm_winnt_module>
ThreadStackSize 8388608
</IfModule>

Place a ( # ) pound sign(hash tag) in front of those lines. 

#<IfModule mpm_winnt_module>
#ThreadStackSize 8388608
#</IfModule>

Save the file. Restart DesktopServer and try your websites.