You're here because you have a file that has a file extension ending in .windowsli. Files with the file extension .windowsli can only be launched by certain applications. It's possible that .windowsli files are data files rather than documents or media, which means they're not meant to be viewed at all.

The most common application associated with .windowsli file extension is Windows Live Messenger. This file extension is also known as .windowslivecontact. Windows Live Messenger is a popular program used by many users in online instant messaging. Like other instant messaging software, this program also allows users from different locations to communicate through online chats. The files with the .windowsli extension are files that are used by this program and they mostly contain basic information about the users of the software such as nicknames, names, phone, email address, title, images, etc. They may not be files used to execute the program, but they are used to make it easy for users to refer to their contact list and get to know information about a certain user. While these files are encrypted, backups can be created into .CTT files. These files can be opened with the use of Microsoft Windows Live Messenger, Adobe Reader, Microsoft Office, WINDOWSLIVECONTACT converter software and WINDOWSLIVECONTACT editor software.

Launch a .windowsli file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .windowsli file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .windowsli files aren't yet associated with it. In this case, when you try to open a .windowsli file, you can tell Windows which application is the correct one for that file. From then on, opening a  .windowsli file will open the correct application. Click here to fix .windowsli file association errors

Be careful not to rename the extension on .windowsli files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

A file extension is the set of three or four characters at the end of a filename; in this case, .windowsli. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.