Laptop has a virus. Watch
Just to put it out there I dont take any responsibility if anything goes wrong, this is simply what I would do.
most of the virus affect the operating system. and it can't be repaired . but you must remove the virus . . you can do it by anti-virus program. i suggest avast . after removing the virus and infected files. install a new operation system. . and it will be working properly .
Just try malwarebtyes and sophos and all that stuff. hopefully its nothing too bad!