did someone email you a c4u file and you're not sure how to open it? maybe you have found a c4u file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a c4u file related error message.
Repeat this setence, but with the correct capitalization.
Did someone email you a C4U file and you're not sure how to open it? Maybe you have found a C4U file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a C4U file related error message.