I have same problem after installing new version of Norton 360. First the existing CCleaner would crash upon booting up the computer. I sent in the logs several times. Then I also tried deinstalling and reinstalling. It says "wait while unloading" but never finishes loading. I just tried to install the slim version, and got farther, getting to the install point, but disappears before completing installation. Apparently there is some conflict with Norton 360. I also tried disabling the firewall and antivirus before doing the install, but no luck either. I have used this product for many years, and this is the first time I have run into a problem.
