Hi, Having some trouble with installing Windows 7 updates. Here is the story so far. Have the 8 latest updates from MS and it continues to fail with error codes 770 and 643. I have tried using Ms's fixit tools to no avail. Cleared and reset update history using: MicrosoftFixit50123.exe MicrosoftFixit.ProgramInstallUninstall.RNP.533036360919113.3.1.Run.exe MicrosoftFixit.wu.LB.533036360919113.8.1.Run.exe MicrosoftFixit.wu.LB.19630387996279612.5.1.Run.exe All of these were supposed to fix any problems but didn't. Error code 643 relates to errors when installing .NET Framework Updates. I have ran sfc /scannow a few times and get the same results. As an output to sfc details.txt I get the following that SFC cannot fix. See attached file. View attachment sfcdetails.txt These seem to be related to windows activation I think. pkeyconfig.xrm-ms seems to be the culprit here. I have windows 7 loader by Daz version 2.2 and have ran windows validation succesfully at microsofts validation webpage' I have run WAT fix with no problems or errors. I had used Hazars activator in the past. I have downloaded and ran MGADiag, but am not sure what the results mean. I guess I will be running that again if someone is there who can help. Just restored a hidden update KB2719033 as I had mistaken this for the KB971033 update. It installed correctly which I find very odd. The failing updates relate to Office 2003 which has updated fine in the past, and one other KB7758694 XML Core service pack 3. Any help with this one please.