Hello i have a similar problem ,2 days ago malwarebytes premium open a lil window that said tha the website was malicious twice even in the googlechrome so i decided close everything and scan the system with malwarebyte but didn't detected any treat in the last step of the scan Heuristic Analysis was like blocked and turned off my laptop i have a lenovo idea pad laptop which has window 7 started after that i turned on and the laptop was working slow i did a scan with avira and nothing was find it ,i deleted all the temps and tried to scan with online nod 32 and found 2 toolbars and delete them , i tried instaling bittorent the antivirus and when did the scan and the las part of the heuristic analysis turned off like the first time with malwarebytes ,just now i did a hyper scan with malwarebytes and an the heuristic analysis didn't work well but at the end didn't show any posible rootkit ,malware or virus .
I'm really worry i don't know why my computer did that and if it is infected .help please !