I have downloaded spybot 2.4 and was able to perform the update. When I click on system scan I get the box asking if I want to allow and click yes but then nothing happens. I am pretty sure there is a virus or malware on my computer not allowing it to run. I have also tried booting in safe mode with networking and it does the same thing. Any advice? Thanks. I am also unable to install any other anti-virus software such as malwarebytes. They download but won't install.