EXT64 :
Hmm, does sound like you are having some intermittent strange internet issues, however they have been moving a lot of servers around, so I would not rule out an issue on their end. Just to do a quick connectivity check, can you run tracert cores.foldingathome.org (or "traceroute ..." from Linux or MacOS)?
Edit: I have been having a lot of issues with very slow or hung GPU WU uploads.
Thanks for the help.
I checked the F@H forum threads, and other people are having the same problems.
I manually downloaded the Core 21file and inserted it.
Made special rules in my router, windows firewall and Malwarebytes.
Updated all of my drivers again, and rebooted , got a work unit and has folded a few during the night.
Not sure if I fixed it or they did ,but I'm folding again.
Thanks again
Rick