Hot answers tagged 64-bit
Your CPU indeed does not support a 64-bit OS because there is no 64-bit in CPU op-mode(s). If your only concern is that the 32-bit version of Google Chrome is unsupported and you are otherwise perfectly happy with 32-bit Ubuntu, then I suggest using the 32-bit version of Chromium, which is supported.
Delays of intermittent length often indicate a failing hard drive. Check Smart status to be certain. Sadly you may just have to replace the drive. Backup all your critical data as soon as possible as data recovery can be challenging from a failed drive. Source: Experience
The hang ups most obviously happen because of using the wrong video driver, I had this issue myself as i installed 16.04 on my desktop PC. So open System Settings --> Software & Updates | Additional Drivers Tab and set the driver there to the open source Nvidia driver or the proprietary one. This should fix your problem.
The Corel application needs libgstreamer-0.10.so to start. Install that library. sudo apt-get libgstreamer0.10-0
Ubuntu 14.04 or Ubuntu 16.04 64-bit should run OK on your hardware, so there is no point in reinstalling a 32-bit operating system on your Dell Inspiron 1525 laptop. For more information about system requirements see the accepted answer to How do I find out which version and derivative of Ubuntu is right for my hardware in terms of minimal system ...
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