Worst software forced into your PC.

I've never had Acrobat reader on any machine that didn't hog bandwidth and memory resources and inevitably screw up while trying to uninstall, upgrade, or install. Unfortunately the USPS website now requires Adobe exclusively. I've tried Nitro and Foxit to no avail. After boycotting any Adobe product for years with the exception of their monopoly on flash, I was forced to install their pdf reader and the installation hangs at 96%. I swear their flash apps are prone to malicious scripts that cause my computer to go bonkers after visiting certain websites.