I have a Dell Laptop dv6-2173 about circa 2010. I have lost all audio (both speakers and microphone). Perhaps this was due to an update of the drivers on this computer by CCleaner. To make matters worse, I recommended CCleaner to two buddies; one with the exact same laptop and another with a Lenevo of about 2015-16 circa. Shortly after activating CCleaner on their computers, the same thing happened to them. We are all running Windows 10 Home 64 bit version. Help! I need to get my speakers and microphone back on my Dell Laptop as well as stay friends with my two buddies. What do you recommend I (we) do?