Late answer but McAfee for example will stop you from using Internet until you pay them. This in addition to causing general issues. (On at least two occasions

Late answer but McAfee for example will stop you from using Internet until you pay them. This in addition to causing general issues. (On at least two occasions have I fixed what weird computer problems just by removing McAfee.) Oh, and yes: scammy click-by-installers when you try to install other software.