Which BOINC version you run (See Help->About BOINC in BOINC Manager). We'd just like the version number, please: for instance v7.8.2
started with an older version, but upgraded to 7.8.3(x64) and the problem persists
What your problem is exactly, write it out in as much detail as you can.
originally started with World Community Grid being unable to communicate, but the end result is all projects are responding to traffic from me with HTTP 401: unauthorized. any time i try to add a project, it fails with the message "The URL you supplied is not that of a BOINC-based project."
from wireshark:
449 12.254294 172.25.128.133 208.68.240.110 TCP 66 57599 → 80 [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1
450 12.255962 208.68.240.110 172.25.128.133 TCP 60 80 → 57599 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460
451 12.255997 172.25.128.133 208.68.240.110 TCP 54 57599 → 80 [ACK] Seq=1 Ack=1 Win=64240 Len=0
452 12.256654 172.25.128.133 208.68.240.110 TCP 268 [TCP segment of a reassembled PDU]
453 12.258926 208.68.240.110 172.25.128.133 TCP 60 [TCP segment of a reassembled PDU]
454 12.268139 172.25.128.133 170.164.50.156 TCP 55 57343 → 8088 [ACK] Seq=1 Ack=1 Win=256 Len=1
455 12.269607 170.164.50.156 172.25.128.133 TCP 60 8088 → 57343 [ACK] Seq=1 Ack=2 Win=65535 Len=0
469 12.451220 172.25.128.133 208.68.240.110 TCP 54 57599 → 80 [ACK] Seq=215 Ack=2 Win=64239 Len=0
470 12.452928 208.68.240.110 172.25.128.133 HTTP 154 HTTP/1.1 401 Unauthorized
474 12.651207 172.25.128.133 208.68.240.110 TCP 54 57599 → 80 [ACK] Seq=215 Ack=102 Win=64139 Len=0
475 12.652736 208.68.240.110 172.25.128.133 TCP 60 80 → 57599 [FIN, ACK] Seq=102 Ack=215 Win=8191 Len=0
476 12.652833 172.25.128.133 208.68.240.110 TCP 54 57599 → 80 [ACK] Seq=215 Ack=103 Win=64139 Len=0
477 12.652911 172.25.128.133 208.68.240.110 TCP 54 57599 → 80 [RST, ACK] Seq=215 Ack=103 Win=0 Len=0
doesnt matter what project i try the results are the same.

What you have done so far to try to remedy the problem.
tried resetting project, etc. uninstalled boinc and installed new version, tried adding config settings to only use http 1.0, tried using a new install folder name (boinc2)
edited proxy to bypass SSL checking for the target.
If applicable, the project(s) that you have the problems with and if they have multiple applications, which ones give you problems.
issues started while i was running world community grid, but now affects all projects i try to add.
Post the first 40 - 100 lines from your BOINC Event Log (CTRL+SHIFT+E), including it showing what your BOINC is doing, which project tasks it is running.
4/24/2018 7:35:49 AM | | Starting BOINC client version 7.8.3 for windows_x86_64
4/24/2018 7:35:49 AM | | log flags: file_xfer, sched_ops, task
4/24/2018 7:35:49 AM | | Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8
4/24/2018 7:35:49 AM | | Data directory: C:\ProgramData\BOINC2
4/24/2018 7:35:49 AM | | Running under account XXXXX
4/24/2018 7:35:49 AM | | CUDA: NVIDIA GPU 0: GeForce GTX 1050 Ti (driver version 381.65, CUDA version 8.0, compute capability 6.1, 4096MB, 3052MB available, 2138 GFLOPS peak)
4/24/2018 7:35:49 AM | | OpenCL: NVIDIA GPU 0: GeForce GTX 1050 Ti (driver version 381.65, device version OpenCL 1.2 CUDA, 4096MB, 3052MB available, 2138 GFLOPS peak)
4/24/2018 7:35:49 AM | | OpenCL CPU: Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (OpenCL driver vendor: Intel(R) Corporation, driver version 4.2.0.148, device version OpenCL 1.2 (Build 148))
4/24/2018 7:35:49 AM | | Host name: XXXXX
4/24/2018 7:35:49 AM | | Processor: 8 GenuineIntel Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz [Family 6 Model 60 Stepping 3]
4/24/2018 7:35:49 AM | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 fma cx16 sse4_1 sse4_2 movebe popcnt aes f16c rdrandsyscall nx lm avx avx2 vmx smx tm2 pbe fsgsbase bmi1 hle smep bmi2
4/24/2018 7:35:49 AM | | OS: Microsoft Windows 7: Professional x64 Edition, Service Pack 1, (06.01.7601.00)
4/24/2018 7:35:49 AM | | Memory: 15.91 GB physical, 31.82 GB virtual
4/24/2018 7:35:49 AM | | Disk: 1.82 TB total, 1.27 TB free
4/24/2018 7:35:49 AM | | Local time is UTC -7 hours
4/24/2018 7:35:49 AM | | Config: use HTTP 1.0
4/24/2018 7:35:54 AM | | No general preferences found - using defaults
4/24/2018 7:35:54 AM | | Preferences:
4/24/2018 7:35:54 AM | | max memory usage when active: 8145.15 MB
4/24/2018 7:35:54 AM | | max memory usage when idle: 14661.26 MB
4/24/2018 7:35:54 AM | | max disk usage: 1297.09 GB
4/24/2018 7:35:54 AM | | don't use GPU while active
4/24/2018 7:35:54 AM | | suspend work if non-BOINC CPU load exceeds 25%
4/24/2018 7:35:54 AM | | (to change preferences, visit a project web site or select Preferences in the Manager)
4/24/2018 7:35:54 AM | | This computer is not attached to any projects
4/24/2018 7:35:54 AM | | Visit http://boinc.berkeley.edu for instructions
4/24/2018 7:35:54 AM | | Suspending GPU computation - computer is in use
4/24/2018 7:36:01 AM | | Fetching configuration file from http://www.worldcommunitygrid.org/get_project_config.php
4/24/2018 7:52:51 AM | | Fetching configuration file from http://asteroidsathome.net/boinc/get_project_config.php
4/24/2018 7:53:00 AM | | Fetching configuration file from http://setiathome.berkeley.edu/get_project_config.php
4/24/2018 7:53:08 AM | | Fetching configuration file from http://universeathome.pl/universe/get_project_config.php

World Community Grid uses an HTTPS URL: https://www.worldcommunitygrid.org, both for their project web site and for adding it through BOINC. So detach, Tools->Add Project->in project URL fill in https://www.worldcommunitygrid.org and continue your normal adding of the project.

We know that the URL in the add project wizard is wrong, it's already been fixed in the all_projects_list.xml file but apparently your BOINC hasn't gotten the new file yet that has the new URL.

---

that allowed me to re-add the project, however once added, the project itself updated to HTTP:// and is still failing to communicate.
I tried editing the all_projects_list.xml and the cc_config.xml, but its still just giving me the same error (communication deferred 24 hours, and wireshark shows the same error)

following the idea that https needed to be updated, i continued through the xml files and updated it everywhere for world community grid and now it appears to be working.

I'm not 100% sure about this, but I think that for World Community Grid you have to open an account first via their website, and only then attach to it through BOINC. That would be different from most other projects, where new account creation can be done as part of the same process as attaching to the project.

If you haven't already, create an account at https://www.worldcommunitygrid.org/join.action#signup, and see if that gets you past the 'attach to project' problems.

the issue started after i had been a world community member for years.
you are prompted to login after the point which this was failing.
the issue was the conversion to https from http.

as a side note, the notices page also complains:
World Community Grid: Notice from BOINC
This project is using an old URL. When convenient, remove the project, then add http://www.worldcommunitygrid.org/
4/24/2018 12:05:59 PM

so even the notices page is out of date for this project now.