As seen in the thread title, since the last update I've a problem: boinc.exe doesn't start at the Windows' boot.
I've installed boinc_7.4.42_windows_x86_64.exe (my system is a 64bit one) as a service on Windows 8.1.
I've found out about this problem 'cause Boinc Manager kept telling me that it couldn't connect. After a while I've discovered that the boinc.exe client wasn't in the active Windows services, so I solved the problem by setting it as a startup application, but I suppose this task would had been automatically set during the installation. With the previous version of Boinc I hadn't this kind of problem, so... any hints?

Already tried to uninstall Boinc, to delete the Data folder and to clean the Register. No luck.

Really no one who could help me?

No luck with this solution (had to struggle a little to install gpedit on Windows 8.1 Standard Edition). However thanks for your message. :)

What's Windows saying, in Event Log (Start, in search type Event Log, wait for Windows to find it, then (double-)click to run. Windows Logs->Application. Or Windows Logs->System.

What anti-virus do you have? Can it be overzealous and be blocking BOINC?
Same for firewall.

And last, what's BOINC saying about this? Your BOINC data directory will have the continued logs, in stdoutdae.txt and stderrdae.txt

---

Later I'll reinstall BOINC and report you about the Event Log and data logs.
In the meanwhile: the antivirus I'm using is Avira and the firewall Comodo: the first one doesn't seem to be overzealous and, about the second one, I've already checked if it was blocking BOINC's outgoing communications, but... nope. All in order.
The only problem is that boinc.exe doesn't load up as a service at the Windows boot: I've to do it manually and, after that, BOINC works as usual.

Reporting you later about logs and so on. Thanks. :)



EDIT:
1. Windows Logs just report me that "19-Apr-2015 10:23:03 BOINC is initializing..."
2. stdoutdae.txt is empty, but I'm attaching stderrdae.txt, which is reporting an "Unhandled Exception Detected". http://goo.gl/uTJ36W

http://goo.gl/uTJ36W – this goo.gl shortlink has been disabled. It was found to be violating our Terms of Service.

Please just post the last full error from the file into a post.

---

New Token ACL Success!!!


Unhandled Exception Detected...

- Unhandled Exception Record -
Reason: Access Violation (0xc0000005) at address 0x00007FF70F8CF4E1 read attempt to address 0x00001000

Engaging BOINC Windows Runtime Debugger...



********************

*** Dump of the Process Statistics: ***

- I/O Operations Counters -
Read: 10, Write: 241, Other 909

- I/O Transfers Counters -
Read: 14539, Write: 3253, Other 31790

- Paged Pool Usage -
QuotaPagedPoolUsage: 123176, QuotaPeakPagedPoolUsage: 123368
QuotaNonPagedPoolUsage: 52736, QuotaPeakNonPagedPoolUsage: 52864

- Virtual Memory Usage -
VirtualSize: 5447680, PeakVirtualSize: 71774208

- Pagefile Usage -
PagefileUsage: 5447680, PeakPagefileUsage: 5447680

- Working Set Size -
WorkingSetSize: 11087872, PeakWorkingSetSize: 11087872, PageFaultCount: 5000

*** Dump of thread ID 1644 (state: Initialized): ***

- Information -
Status: Base Priority: Normal, Priority: Normal, , Kernel Time: 0.000000, User Time: 0.000000, Wait Time: 0.000000

- Unhandled Exception Record -
Reason: Access Violation (0xc0000005) at address 0x00007FF70F8CF4E1 read attempt to address 0x00001000

- Registers -
rax=00000000be8a38a0 rbx=0000000000000000 rcx=00000000023df890 rdx=0000000000000000 rsi=0000000000000000 rdi=000000000f9281e0
r8=0000000000000100 r9=00000000424d484e r10=00000000a5905730 r11=00000000023df868 r12=0000000000000100 r13=0000000000000000
r14=0000000000000001 r15=0000000000000000 rip=000000000f8cf4e1 rsp=00000000023df6d0 rbp=00000000023df890
cs=0033  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00010206

- Callstack -
ChildEBP RetAddr  Args to Child
023df860 0f88fc5d 0000000f 011a17e0 6c632f3c 7475615f boinc!+0x0 
023df9a0 0f857d4c 00000000 00000000 0f9281e0 00000000 boinc!+0x0 
023dfb90 0f894e62 01185d10 a2f85aa0 01185d10 a2f85aa0 boinc!+0x0 
023dfbd0 0f8a81c8 00000000 00000000 0118dfc0 00000000 boinc!+0x0 
023dfc00 a2f85ada 00000000 00000000 00000000 00000000 boinc!+0x0 
023dfc30 a34a13d2 a2f85aa0 01185d10 00000000 00000000 sechost!SubscribeServiceChangeNotifications+0x0 
023dfc60 a5915444 a34a13b0 00000000 00000000 00000000 KERNEL32!BaseThreadInitThunk+0x0 
023dfcb0 00000000 00000000 00000000 00000000 00000000 ntdll!RtlUserThreadStart+0x0 

*** Dump of thread ID 32763 (state: Initialized): ***

- Information -
Status: Base Priority: Normal, Priority: Unknown, , Kernel Time: 6.000000, User Time: 0.000000, Wait Time: 3016025600.000000

- Registers -
rax=0000000000000000 rbx=0000000000000000 rcx=0000000000000000 rdx=0000000000000000 rsi=0000000000000000 rdi=0000000000000000
r8=0000000000000000 r9=0000000000000000 r10=0000000000000000 r11=0000000000000000 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000 rip=0000000000000000 rsp=0000000000000000 rbp=0000000000000000
cs=0000  ss=0000  ds=0000  es=0000  fs=0000  gs=0000             efl=00000000

- Callstack -
ChildEBP RetAddr  Args to Child
(-nosymbols- PC == 0)
00000000 00000000 00000000 00000000 00000000 00000000 !+0x0 

The file is more much longer, but I think the part you need is only the above.
The full file can't fit in a single post, that's why I've attached the .txt.

Please post the whole error. It'll start with Unhandled Exception Detected... and end with Exiting...

As for the Goo.gl link, sending me the same link in PM isn't going to help. It's not me blocking what's there, but Google.
Check their terms of service, at http://goo.gl/policy.html and http://www.google.com/intl/en/policies/terms/regional.html for where you may have gone wrong.

---

As I said, posting a 3515 lines long file in this post isn't possible.
Didn't know about the Google policies about links: thanks for letting me know.
Is posting the Mediafire link to the .txt file going to work?

http://www.mediafire.com/view/u25vsntrfd6q66d/stderrdae.txt

As I said, posting a 3515 lines long file in this post isn't possible.

And who said anything about that?
The first error in your file is between lines 1 and 520. Ample of space in a thread as this. I asked for one example of the error, not the whole file.

OK, make sure you have BOINC installed, and installed as a service, then try to start Windows in Diagnostic mode.

1. Open System Configuration by clicking the Start button Picture of the Start button, clicking Control Panel, clicking System and Security, clicking Administrative Tools, and then double-clicking System Configuration.‌ Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.

2. Click the General tab, click Diagnostic startup, click OK, and then click Restart.

If that fixes BOINC starting as a service, it's something in your Windows (d'oh) that blocks the starting of BOINC.

You could also try setting the BOINC service to start Automatic (Delayed Start). Then it doesn't try to start immediately after Windows start-up.

I highly suspect that it's Comodo that does the (silent) killing of the BOINC process. Make sure you completely exclude the BOINC programs directory and the data directory from being actively scanned/blocked by Comodo software. It is very overzealous stuff. If you have the option(s), set AV and firewall to be verbose, so you can see what they're doing.

What if you delete the access right groups for BOINC and BOINCMGR in Comodo and try to have it detect these anew at BOINC start-up? BOINC.exe needs access to internet on TCP/UDP 80 and 443, plus a connection to BOINCMGR on TCP 31416. BOINCMGR needs access on TCP 31416.

Or you can do a (Google) search on "Comodo firewall blocks boinc" and "Comodo firewall blocks boinc service" (without quotes). Plenty of examples of where it goes wrong.

---

Ok, will try playing a little around with Comodo and let you know.
Thank you very much for your help. :)