Phil Leckrone and I had a mysterious problem, that John Wickberg diagnosed for us. Our Paratext could never check for updates. We’d go to Help > Check for Updates and Paratext would quickly say it could not connect to the update server. There was no problem with our Internet settings or firewall, we were able to send/receive and do other things in Paratext on the internet without problems.
What John found was that a Windows tool called Background Intelligent Transfer Service (BITS) was frozen, by some jobs that had started but had been unable to finish. (None of these related to Paratext). What worked, was to run a command prompt command to empty our BITS queue.
The way to do this was to right click on a Command Prompt icon and choose “run as administrator”. Then we typed “bitsadmin /list”, and this showed the list of BITS jobs. Normally this should be empty. SInce it wasn’t for us, we could purge the queue by typing “bitsadmin /reset”. This emptied the BITS queue and our Paratext could check for updates again.