C curious_serge Member Joined May 7, 2013 Posts 9 May 7, 2013 #1 Hi guys, I'm so happy I found this forum and hope you'll be able to help me! My Windows 7 Home Premium 64-bit SP1 cannot install some important and optional updates. I get error codes 80073712 and 9C57. I downloaded and installed Windows6.1-KB947821-v26-x64, and I can see that I have 134 errors, which I cannot seem to find in other threads. I'm attaching here my CBS log folder. The only file I removed from it was CBS.persist.log, because it was the largest file and it was not updated in three years. I hope the rest will provide enough information for troubleshooting. Before I found this site, I tried other steps. I ran sfc /scannow without any success, and then I tried in-place upgrade for WIN7 64-bit SP1. After couple hours, the in-place upgrade encountered an unknown error and rolled back. After that, I got UNMOUNTABLE_DISK_ERROR on a blue screen. Luckily, I had system image that was just one week old, so I restored my system from that. I have RAID0 drives, and drive 0 showed an error. However, after I restored the computer from system image, I ran chkdsk, and it did not find any errors. Thanks in advance!