Ok ... thanks for ur time reading my post As I said, i have a problem with W7 (x64 of course), this problem starts when im finishing the installation of my AV (Antivirus if u dont know). This erros says: "The ordinal 6929 could not be located in the dynamic link library mfc90u.dll" The AV is Avira, and i contacted to the TechSupport to solve this error, but after many re-installations... the problem was obviously windows u.u, I did the following steps: (all installations, were suggested by the technSupport team Avira and Microsoft's home page) 1: The Microsoft Visual C++ 2008 SP1 Redistributable Package (x64) ... (restart) ... (the Antivirus was removed before) 2: After that, I reinstall the latest version of Antivirus... Again, the error appeared at the end of the installation. so then... 3: Uninstall the AV... (restart) ... after check and install all updates for windows i restart again windows 4: I found this article "Fix Microsoft Security Bulletin MS11-025 - Important" about Vulnerability in Microsoft Foundation Class (MFC) Library Could Allow Remote Code Execution (2500212) 5: read this article, takes me to Microsoft's web page to find the new pack of C++ and i found this one (installed) Last version is Microsoft Visual C++ 2008 Service Pack 1 Redistributable Package MFC Security Update 6: after restart, is the error finally solved?... sorry but i have to said NO, I did it all, but the error still. Sincerely I hope you understand my problem, because I wont make a mostake just for install tools what an ordinary forum suggest to do. Thats why im here at Microsoft Technet forum, an official forum about windows. *Never had this error before since i restored windows to factory mode (could be the cause...? hope no u.u) Thanks a lot for reading me... have a nice day. LAMIAS

Hi, According to your description, I suggest to perform these tests to troubleshoot the issue: 1 Logon with Clean Boot 2 Remove some third party tools 3 Temporally disable UAC Furthermore, you can install Windows 7 SP1 package for test. In addition, if the issue only occur with AntiVir, you’d better contact AntiVir for further help: http://forum.avira.com/wbb/ Please Note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information. Thank you for your understanding. Regards, Leo HuangPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.