Two of my hosts have had "Creators Update" shoved down their throats this week. Both started failing PrimeGrid GPU tasks immediately, having been "upgraded" by MS from Nvidia driver 376.53 to 382.05; manually installing 384.76 fixed that... (Same thing has happened on other "updates", so I wasn't too surprised by this one.)

One host continues to do WuProp and everything else fine. The other got stuck with a WuProp task uploaded but not reported. Hitting Update got a "Certificate Error". Reset, messed with certificates, rebooted, messed with firewall, all no go, still wouldn't report. Detached and tried to re-add project, could not get WuProp attached - "error 184" from BoincTasks, just a "try again later" doing it directly in BOINC Manager.

Tried to reattach using HTTP not HTTPS, and it worked fine. So somewhere there's a security issue...

Still have not solved similar problem with Collatz, where uploads are all failing with "transient HTTP error". May try the non-S fix on that as well, just hate to lose the work. Sigh.