I was on the internet (Mozilla Firefox) and I was just browsing then a message came up and said something like 'Windows defender needs you to restart your computer to solve a problem' so I clicked it and then it obviously restarted. I tried to log onto my user area and it took longer than usual to load up and when it finally loaded up it had a blank background and my documents, no task-bar or shortcut. The only way I got onto the internet was by going on my downloads going on Spotify and then clicking on an advert, for the past couple of days I've been getting warnings saying that I have a harmful virus so I clicked 'Remove' and it said it had gone but every hour or so it kept coming back up. Also I have Windows Vista. Sorry it's so long Happy New Year thanks