Whenever I try to open WLM, I always get the "Side-to-Side Configuration" error. Looking deeper into it, I found out that two manifests are clashing each other, therefore preventing the successful operation of WLM.

Is there any way to delete manifests without spending any money and without the need to restore the laptop to factory settings?

you could try the solutions posted here:
http://shoutbox.menthix.net/showthread.php?tid=79697

I tried to uninstall and reinstall both programs, but even the newest beta version of MSN Live Messenger isn't working. I uninstalled my Virus scanners to see if that helped, but it didn't.