Hi Beata2882,
Do as essexboy suggests,
We will need you to show hidden Files \Folders.
To do this:
*Click Start.
*Open My Computer.
*Select the Tools menu and click Folder Options.
*Select the View Tab.
*Under the Hidden files and folders heading select Show hidden files and folders.
*Uncheck the Hide protected operating system files (recommended) option.
*Click Yes to confirm.
*Click OK
I think this can be cleansed with a smitfraudfix, but let’s see what essexboy suggests,
I trust essexboy, he is a qualified malware cleaning expert, later you can have a second opinion by me,
polonus