@drumbliss said: It seems likely that the following error message from Install-CheckUp.exe references an incorrect MS Hotfix: [image: Screenshot%202016-12-07%2002.50.23.png] It appears the necessary Hotfix is KB2999226, not KB299926, as that's what comes up in all web-searches. I have not been able to verify this via installation, but KB299926 does not appear to exist. which version of Window are you using? Also, 32-bit or 64-bit?

Windows 7, SP1. I didn't have any "critical updates" due, and "Hotfix KB299926" doesn't seem to exist. All searches for this Update come up with "KB2999226" which has an extra "2". I've now been trying to install the latter, but the Windows Updater always hangs during the install. Having to shift my priorities elsewhere for the moment, but will report if/ how this is fixed. A graphics card update may be in order (as you suggested on SU's forum). Thanks.