AtiCimUn.exe is part of a product called known as ATI Graphics Accelerators and the developer is ATI Technologies Inc. .
If you think that this file contains a virus or another malware, please download a virus scanner.
If AtiCimUn.exe is using too much CPU or too much memory in your system, it is possible that your file has been infected with a virus. Installing an antivirus is recommended.
Not all processes can be uninstalled without the help of a 3rd party tool, especially malware. To see if it can be uninstalled, first go to Start > Control Panel > Add/Remove programs and select ATI Graphics Accelerators from the list to remove the process AtiCimUn.exe from your computer.
If you have any problems with AtiCimUn.exe, you may try using a registry cleaner or a speed-up software to check, analyze, and fix problems that are affecting the performance of your computer.
You may try contacting ATI Technologies Inc., the developer of AtiCimUn.exe and ask for more information.