I have been having trouble for about a week and a half and now its really bad. every time I run the installer it gets to 100% then just starts rolling back. I uninstalled the previous versions of messenger/s and even went into program files and tried to take everything related live messenger and then I try to run the installer again but the same thing happens. When I first ran into this I would just go to filehippo and get a older version and install that and everything would be back to normal but now when I try that the older version of live messenger forces me to upgrade and its a never ending cycle of me running the installer over and over again and nothing happens. I haven even tried to create a new user and see if I could install it through there but It still rolls back. I hope someone in here can help me and sorry if this has already been posted I'm new here thanks to everyone.