Originally Posted by Chrisamgad
Hello . My Phone (Samsung Galaxy S3) used to connect to PC all the time until yesterday suddenly it stopped.I had that Samsung driver installed.I tried uninstalling then re installing..Still not working ..I downloaded Kies ..Nothing worked.I had read reviews about people solving their problem in the device manger.(Right click on My computer>Manage>Device Manager)I searched for my phone name and i found it.It had a yellow exclamation mark on it. I right clicked it >Update driver Software.I tried searching online but it wasn't found so i had to browse my computer for driver software.It is found in C:/Windows/System32 ... but then it gave me an error "Windows found driver software for your device but encountered an error while attempting to install it. USB Composite Device Access is denied". I think it is something in permissions that i should change .By the way I am logged in as the admin of Pc. Please Help .It's so important for me.I think it has something to do with permissions..
Try using another cable and see.
After that, I can suggest that you uninstall the driver on your PC, reboot the PC and then connect your phone again.