I installed Avira (free version) and Malwarebytes Anti-Malware, for protection last year. I update very regularly. Every week there are updates available and the size of the update files is quite significant. My computer has become terribly slow. Can the accumulation of these updates (files) slow down the computer? There is no end to the updates. Does the update remove the previous versions or do they just keep on accumulating on the hard drive? If they do, how do we remove the previous versions, to free memory and make the computer run faster ( at least as fast as it used to run before ).