Have just successfully downloaded Avast using USB pendrive, but not without a big scare . Uninstalled Mcafee anti virus and disabled firewall, connected pendrive to laptop and downloaded with no problems. Clicked RESTART COMPUTER , as requested for full installation. Computer closed down but would not restart, just leaving a flashing cursor on the screen.Tried everthing to restart, including disconnecting power supply and letting battery run down , but with no success . Decided to call it a day and unplugged the pendrive.
Low and behold, the laptop burst into life and installed Avast with no problems. Have checked all systems and everything seems to be running fine.
I would advise anybody downloading from a USB pendrive to click RESTART YOUR COMPUTER LATER (I'm sure I was given this option) and uninstall the pendrive before rebooting.
Any idea why the laptop would not reboot with the pendrive still installed ?