|It may be spyware or adware problem. You can scan your computer with Malwarebytes in Safe Mode. |
You should also remove all temporary files.
Start > Run and type TEMP > OK.
Delete all temporary files and folders.
Start > Run and types %TEMP% > OK
Delete all files and folders.
Scan your whole computer with Malwarebtes in Safe Mode and remove it. It should must be updated
You can also optimize internet explorer.
Open Internet explorer > "Tools"> Internet options.
In general tab, Delete all files, browsing history, clear history.
In security tab, Set as defualt.
In content tab, Clear SSL.
In advance tab, Set as restore default.