I have windows 7 operating system in my laptop. I left my comp for few hours and when I came back I saw a dialog box asking "VLC Plugin for Firefox". Stupidly enough, I thought it was the real VLC and downloaded it. The setup downloaded the file and I immediately realized it was some form of malware/spyware as my laptop went to blue screen. I restarted it and it seemed to be working fine but the blue screen came up after 5 mins and the cycle continued. I noticed a new file called 'FileZilly" was downloaded in my computer. I tried running Malwarebytes but after 5-10 secs the program closes by itself. I tried running Avast and CCleaner but they all close after few secs and later when I clicked on .exe file it doesn't open, saying "windows can't open the specified file...". I really don't know what to do and so any suggestions will be really helpful. Thank You