According to technical analysis from the community, the app performs several background functions:

For persistent software issues, Lenovo recommends using the Software Fix tool on a Windows PC to diagnose and resolve system-level glitches. Lenovo tablet backdoor? - Linus Tech Tips

Since OCZ_ClientDownloader is a system-level APK, it usually cannot be uninstalled through standard settings. If you find it intrusive, here are your options:

Under the app settings, turn off all notifications to prevent promotional pop-ups.

It extracts content into a dedicated folder (often /lenovocust/ ) to execute specific activities or install web shortcuts. Why Is It on Your Device?