Goodmorning.
I have a dual boot installation with PCLinuxOS 2013.10 and Windows 7 on my laptop and I want to replace Windows 7 with Windows 8 for testing before installing them on my family desktop. I know that after installation dualboot doesnot work. I found two solution, links below, but first they refer to windows only and second as a beginner I'm afraid to use them because they use terminal. Searching Internet I read that Ubuntu has a LiveCD for this jod. PClinuxOS has a CD like that? Thank you in advance.

http://saleem-khan.blogspot.gr/2008/04/how-to-reinstall-grub-on-pclinuxos.html

http://pclosmag.com/html/Issues/201101/page10.html

You might want to try asking on the PCLinuxOS forums concerning this, or alternately, try using the Ubuntu disc in any case - the bootloader (Grub) used by most Linux distributions are quite similar.