As I predicted earlier in this thread. Whatever this is [tech silence does not solve it], the working solution was upgrading the client. 7.2.47 or 7.6.9.

If like what Eric wrote in second instance, it seemed specific the his droid, it is no option [he's seemingly stuck with Android something < 4.5 or < 4.1, NativeBOINC does not run on >=5.0 die the PIE requirement], then it is SOOL, too bad I suppose.

I bought a new ASUS X555D AMD Quad Core to use it to run WCG program. I downloaded and installed BOINC 7.6.9 version. But BOINC is not running.
I always get next message: "BOINC closed unexpectedly twice in last 3 minits" and
on BOINC Manager appears message: "It couldn't connect at client's core."
I just restarted it but I got the same result.

Can somebody help me to resolve this my trouble asap?

Thank you anticipate.

pettud

Please send the first part of your event log, as I have done.

11/25/2015 6:39:32 AM |  | cc_config.xml not found - using defaults
11/25/2015 6:39:32 AM |  | Starting BOINC client version 7.6.9 for windows_x86_64
11/25/2015 6:39:32 AM |  | log flags: file_xfer, sched_ops, task
11/25/2015 6:39:32 AM |  | Libraries: libcurl/7.39.0 OpenSSL/1.0.2a zlib/1.2.8
11/25/2015 6:39:32 AM |  | Data directory: C:\ProgramData\Boinc
11/25/2015 6:39:32 AM |  | Running under account Pete
11/25/2015 6:39:32 AM |  | CAL: ATI GPU 0: AMD Radeon HD 7850/7870 series (Pitcairn) (CAL version 1.4.1848, 1024MB, 984MB available, 4608 GFLOPS peak)
11/25/2015 6:39:32 AM |  | OpenCL: AMD/ATI GPU 0: AMD Radeon HD 7850/7870 series (Pitcairn) (driver version 1800.11 (VM), device version OpenCL 1.2 AMD-APP (1800.11), 1024MB, 984MB available, 4608 GFLOPS peak)
11/25/2015 6:39:32 AM |  | OpenCL CPU: AMD Phenom(tm) II X6 1090T Processor (OpenCL driver vendor: Advanced Micro Devices, Inc., driver version 1800.11 (sse2), device version OpenCL 1.2 AMD-APP (1800.11))
11/25/2015 6:39:32 AM |  | Host name: Desktop05
11/25/2015 6:39:32 AM |  | Processor: 6 AuthenticAMD AMD Phenom(tm) II X6 1090T Processor [Family 16 Model 10 Stepping 0]
11/25/2015 6:39:32 AM |  | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 htt pni cx16 popcnt syscall nx lm svm sse4a osvw ibs skinit wdt page1gb rdtscp 3dnowext 3dnow
11/25/2015 6:39:32 AM |  | OS: Microsoft Windows 10: Professional x64 Edition, (10.00.10586.00)
11/25/2015 6:39:32 AM |  | Memory: 8.00 GB physical, 16.00 GB virtual
11/25/2015 6:39:32 AM |  | Disk: 465.32 GB total, 204.50 GB free
11/25/2015 6:39:32 AM |  | Local time is UTC -5 hours
11/25/2015 6:39:32 AM | World Community Grid | Found app_config.xml
11/25/2015 6:39:32 AM |  | Config: GUI RPCs allowed from:
11/25/2015 6:39:32 AM |  | 192.168.0.227
11/25/2015 6:39:32 AM | World Community Grid | URL http://www.worldcommunitygrid.org/; Computer ID 1344018; resource share 100
11/25/2015 6:39:32 AM | WUProp@Home | URL http://wuprop.boinc-af.org/; Computer ID 36637; resource share 100
11/25/2015 6:39:37 AM | World Community Grid | General prefs: from World Community Grid (last modified 03-Aug-2015 13:39:26)
11/25/2015 6:39:37 AM | World Community Grid | Host location: none
11/25/2015 6:39:37 AM | World Community Grid | General prefs: using your defaults
11/25/2015 6:39:37 AM |  | Preferences:
11/25/2015 6:39:37 AM |  | max memory usage when active: 6142.62MB
11/25/2015 6:39:37 AM |  | max memory usage when idle: 7371.14MB
11/25/2015 6:39:37 AM |  | max disk usage: 30.00GB
11/25/2015 6:39:37 AM |  | don't use GPU while active
11/25/2015 6:39:37 AM |  | (to change preferences, visit a project web site or select Preferences in the Manager)

@petehardy, without a successful connect of BOINC Manager to BOINC client (boinc.exe), doubt you can access the Event log in the manager.

pettud writes "I always get next message: "BOINC closed unexpectedly twice in last 3 minits" and
on BOINC Manager appears message: "It couldn't connect at client's core."

Something is killing the core client, where I would first suspect any security software blocking the startup or the firewall blocking the communication over localhost. Exceptions need setting in that case.

Event log transactions go the the stdoutdae.txt file, where the 'dae' part means daemon [core client]. That's the file to copy the activity from in a reply.

The fix was that the cloud was cleaned up to only have 'https' versions. Temporarily http was also enabled for that still having the download problem from an old download attempt [to get the unattended devices going]. For discussion see post by knreed [which contains no BOINC version 'bunk']