Over the last couple of days while on the internet my laptop has slowed down to the point that when I type something in there is a lag between me pressing the keys and it showing on the screen. When checking my modem stats I find that im quite a lot of data for no obvious reason. When I close my browser it stops, then when I re-open it it begins again. This has happened 3 or 4 times over the last couple of days. Im using Opera browser and 3g mobile broadband. Ive done scans and there doesnt seem to be anything malicious on my laptop. Is it anything to worry about?
I scanned with malwarebytes, spybot and a symantec online virus scan. Spybot came up with some adware cookies and highlighted spyhunter. Ive dealt with those but dont think they had anything to do with it. It's not doing it right now but I still cant understand what it was sending and why.