1. Did yoiu ever have another AV installed before Mcafee if so did you use its own removal tool before installing Mcafee?
2. What file is it freezing on is it the same file every time? Not files in windows\checksur folder?
In the 3 years have you uninstalled ever or just done upgrades over the old version? Maybe a reinstall a good idea.
reboot and run
reinstall from your account.