I have a Samsung RC512-S02US. Windows 7 64-bit did an update and would only boot to startup repair. One of my coworkers suggested I delete the catroot folders and windows would fix it. It ended up being the MBR. Then Windows would not boot because the bootcat.cache was not right. I replaced the bootcat.cache and the catroot files from a previous backup. My computers booted successfully but the Intel 6 series/C200 Series Chipset Family USB Enhanced Host Controller 1C26 & 1C2D + Renesas Electronics USB 3.0 Host Controller drivers do not install properly so I have no functioning USB ports. I have tried downloading and installing them from Samsung's site and Intel's site. They worked before but will not install properly now. Any suggestions? Anything would be much appreciated. Thank you in advance.