I dl'd and tried to install this file: "00LTP550-TurboCADLTEPro5x64.exe"
It said it had to install MS NET 4. I clicked OK and it ran it's spinner a minute or so and said it need to reboot - "now or later". I chose later and installed a newer Sketchup, then rebooted.
There were messages on the screen during shutdown and startup about "completing ... 1 [or 2 or 3]" and Sketchup appeared in the menues OK. but TurboCAD did not. I reran the above install file and got the message quoted in the subject.
The system is a Gigabyte board w/an AMD X6 processor and 4GB ram. Other apps are OK. This looks like some kind of sniffer problem.