My laptop bluescreened the other day twice when I attempted to start it up. On the third try, it worked, but it's been acting strange. I open a window and it freezes for about a minute, then works normally, then freezes for another minute and so on. Now today, I tried to watch a movie on Netflix and I got an error message saying it had to close in an unusual way. It said dllhost.exe somewhere on it, so I googled it and found that viruses can disguise themselves as dllhost and that the only place it should be is in the system32 folder. So I searched my files for dllhost.exe and it had three files in Prefetch, one in system32 and one in ServicePackFiles/i386. I scanned it with Malwarebytes and Avira and both showed up clean. I absolutely have no idea what I'm doing or if it's related to the bluescreening or not, but I'm hoping I don't have a virus.