atieclxx.exe is a application which is most likely NOT a virus or malware. So, if atieclxx.exe is on your PC, it is most likely ok, and will NOT be a cause for concern. Even if your system is clean, it is still recommended to run a good antivirus with a good track record, in order to yourself your PC against viruses and malware.
Normally, this application is stored in C:\Windows\System32\atieclxx.exe.
The MD5 fingerprint for this executable is 378f5eb676c0bd7eaaafa7ad5ba44b16.
This application does NOT run as a Windows service. This is usually a good sign.
This application runs as a 32-bit program. It can not benefit of the entire set of features of nowadays' computer CPUs. This is quite normal because the publishers did not bother to upgrade it to use the x64 instruction set.
The description extracted from the program is AMD External Events Client Module.
File version extracted from the file 18.104.22.1683.
Company name AMD.
Copyright notice Copyright © 2008-2009 AMD.
This exe does NOT have visible elements of user interface. This is usually a bad sign.
atieclxx.exe is digitally signed. Nowadays most serious software applications are digitally signed.
The digital signature attached to atieclxx.exe is valid. This is excellent.
Digital certificate name: Microsoft Windows Hardware Compatibility Publisher
Certificate's issuer name: Microsoft Windows Hardware Compatibility PCA
This executable does NOT have an uninstall command set up in registry.