What security precautions do you use on this computer, eg firewall, anti-virus, anti-malware?
Try Grif's advice in the link below;
You only need to use another computer as mentioned in Grif's post if you are unable to download and/or install and update Malwarebytes' on your own system.
I have a new HP Laptop with Windows7 installed. Until recently it's been working perfectly then suddenly Internet Explorer started malfunctioning, taking ages to open pages and then the last few days "not responding" messages popping up, and many more pop-ups. Also my music programmes Real Player, Windows Media and ITunes are seriously affected, the music programmes probably the worst. I've tried system restore and also tried running IE without "Add Ons". The latter was OK for a couple of hours then eveything went AWOL again. Can I fix this or will it need to go in for repair??