I have mistakenly changed the default settings for my .dll files, now they wont exe, how can i re-set these files to proper default? I have tried changing with defualt programs but none seem to work so far, can anyone help?

Hello, try restoring your system state using a restore point that dates before the appearance of your problem. If you don't have restore points, try running sfc /scannow. If this does not help, perform a repair install of your OS. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator

You may try System Restore.Please 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.