HP Laptop, Running Windows 8.1 and CCleaner v 5.03 and I am unable to start CCleaner and when I try to Uninstall it hangs up part way through the uninstall process ( I let it run for an hour or so). The previous version of CCleaner v? was installed and would not open so I installed v5.03 over top with the same issues. The only way I can make it run is to install it and it asks at the end of the install if you want to the program to open. I let the program open, used to get rid of my history, did a registry cleanup, shut down the computer, restarted and it still does not work.