An unexpected error message containing the u-xdq-oc.dll file may affect some computers upon start up. The u-xdq-oc.dll process is an element of the u-xdq-oc.dll module program, and may especially be present after the installation or deletion of new programs. The u-xdq-oc.dll file is currently under review to determine whether it is a computer virus or a legitimate file. The best way to determine this is to learn which directory the u-xdq-oc.dll file comes from.
The reason it may crop up after installation or deletion is because some of the overwritten or deleted files may be required to run another program. This is one important way that these types of errors may occur.
Error messages can effectively be removed through the use of a good registry cleaner such as ZookaWare PC Cleaner, which is guaranteed to be able to repair errors with just one scan. ZookaWare PC Cleaner is a member of the Better Business Bureau and offers a money-back guarantee for 100% removal of error messages.