Antivirus software may prevent downloading or fully installing KnowIT due to the many processes being monitored.
To avoid installation problems, temporarily disable your anti-virus software until after KnowIT has been fully installed, and its system folders have been excluded from future anti-virus scanning.
Most A/V apps have a shortcut to temporary disable scanning from the Windows system tray menu. Make sure you have turned off any resident shield and file scanning functions before installing KnowIT.