Types of XO Files

Primary XO File Association

.XO

File Format:	.xo
File Type:	XML Infosets file

Created by:	Microsoft, IBM, BEA, Canon
File Category:	Data Files
Registry Key:	HKEY_CLASSES_ROOT\.xo

Software Programs That Open The XML Infosets file:

XML Infosets file by Microsoft, IBM, BEA, Canon

Windows

Optional Offer for FileViewPro by Solvusoft | EULA | Privacy Policy | Terms | Uninstall

Troubleshooting Problems Opening XO Files

Common Problems Opening XO Files

XML Infosets file is Not Installed

When you double-click your XO file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". If this is the case, it's usually due to the fact that you do not have XML Infosets file for %%os%% installed on your computer. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.

Tip: If you know of another program that can open your XO file, you can try opening it by selecting the application from the programs listed.

Wrong Version of XML Infosets file is Installed

In some cases, you might have a newer (or older) version of a XML Infosets file file that is unsupported by your installed application version. If you do not have the proper version XML Infosets file (or any of the other programs listed above), you may need to try downloading a different version of it, or one of the other software applications listed above. This problem is most common when you have an older version of the software application, and your file was created by a newer version that it cannot recognize.

Tip: Sometimes you can get a clue about the version of XO file you have by right clicking on the file, then clicking on "Properties" (Windows) or "Get Info" (Mac OSX).

Summary: In either case, the majority of problems opening XO files are related to not having the correct software application installed on your computer.

Other Causes of XO File Opening Problems

Although you might already have XML Infosets file or another XO-associated software installed on your computer, you can still encounter problems opening XML Infosets file files. If you are still having problems opening XO files, there may be other issues that are preventing you from opening these files. These other problems include (listed in order from most to least common):

• Invalid XO file references in the Windows Registry (the "phonebook" of the Windows Operating System)
• Accidental deletion of the description of the XO file in the Windows registry
• Incomplete or bad installation of a software application associated with the XO format
• Your XO file is corrupted (issues with your XML Infosets file file itself)
• Your XO is infected with malware
• Device drivers of the hardware associated with your XO file are corrupt or out-of-date
• Your computer does not have the adequate system resources to open the XML Infosets file format