So, I updated to version 1511 of Windows 10, and started running BOINC again, but for some reason, it does not detect my graphics card anymore. I didn't change anything, aside from the update, so, I haven't the slightest why it wouldn't detect my GPU. Any suggestions?

Sorry for the double post but things are a bit weirder. There are some projects that are detecting the GPU (Moo Wrapper) and others that are not (Collatz Conjecture)

I have the same Problem with Win7 x64 BOINC Version 7.4.42 and the newest BOINC Version 7.6.22 (X64)
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20.07.2016 19:07:18 | | Starting BOINC client version 7.4.42 for windows_x86_64
20.07.2016 19:07:18 | | log flags: file_xfer, sched_ops, task
20.07.2016 19:07:18 | | Libraries: libcurl/7.39.0 OpenSSL/1.0.1j zlib/1.2.8
20.07.2016 19:07:18 | | Data directory: C:\BOINC\DATA
20.07.2016 19:07:18 | | Running under account heinz
20.07.2016 19:07:18 | | GPU detection failed. error code -1073741819
20.07.2016 19:07:18 | | No usable GPUs found
20.07.2016 19:07:18 | DistrRTgen | Found app_info.xml; using anonymous platform
20.07.2016 19:07:18 | | app version refers to missing GPU type CUDA
20.07.2016 19:07:18 | SETI@home | Found app_info.xml; using anonymous platform
20.07.2016 19:07:18 | | app version refers to missing GPU type CUDA
20.07.2016 19:07:18 | | app version refers to missing GPU type CUDA
20.07.2016 19:07:18 | | app version refers to missing GPU type CUDA
....
....
20.07.2016 19:07:18 | | app version refers to missing GPU type NVIDIA
20.07.2016 19:07:18 | | Host name: dora
20.07.2016 19:07:18 | | Processor: 4 GenuineIntel Intel(R) Core(TM) i3 CPU M 390 @ 2.67GHz [Family 6 Model 37 Stepping 5]
20.07.2016 19:07:18 | | 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 cx16 sse4_1 sse4_2 popcnt syscall nx lm vmx tm2 pbe
20.07.2016 19:07:18 | | OS: Microsoft Windows 7: Home Premium x64 Edition, Service Pack 1, (06.01.7601.00)
20.07.2016 19:07:18 | | Memory: 3.80 GB physical, 9.50 GB virtual
20.07.2016 19:07:18 | | Disk: 546.24 GB total, 215.92 GB free
20.07.2016 19:07:18 | | Local time is UTC +2 hours
20.07.2016 19:07:18 | | Config: simulate 4 CPUs
20.07.2016 19:07:18 | | Config: use all coprocessors
20.07.2016 19:07:18 | DistrRTgen | URL http://boinc.freerainbowtables.com/distrrtgen/; Computer ID 42527; resource share 100
20.07.2016 19:07:18 | Collatz Conjecture | URL https://boinc.thesonntags.com/collatz/; Computer ID 110487; resource share 100
20.07.2016 19:07:18 | Collatz Conjecture | Your current settings do not allow tasks from this project. To fix this, you can change Project Preferences on the project's web site.
20.07.2016 19:07:18 | Docking | URL http://docking.cis.udel.edu/; Computer ID 87378; resource share 100
20.07.2016 19:07:18 | LHC@home 1.0 | URL http://lhcathomeclassic.cern.ch/sixtrack/; Computer ID 9948271; resource share 50
20.07.2016 19:07:18 | Moo! Wrapper | URL http://moowrap.net/; Computer ID 7113; resource share 100
20.07.2016 19:07:18 | SETI@home | URL http://setiathome.berkeley.edu/; Computer ID 6023152; resource share 100
---------------------------------------------------

This happened always when the Computer starts and load and start BOINC

when I close BOINC inclusive all running apps and then start BOINC again it finds the GPU's.
----------------------------------------------------
20.07.2016 19:15:55 | | Starting BOINC client version 7.4.42 for windows_x86_64
20.07.2016 19:15:55 | | log flags: file_xfer, sched_ops, task
20.07.2016 19:15:55 | | Libraries: libcurl/7.39.0 OpenSSL/1.0.1j zlib/1.2.8
20.07.2016 19:15:55 | | Data directory: C:\BOINC\DATA
20.07.2016 19:15:55 | | Running under account heinz
20.07.2016 19:15:55 | | CUDA: NVIDIA GPU 0: GeForce GT 540M (driver version 368.39, CUDA version 8.0, compute capability 2.1, 1024MB, 970MB available, 258 GFLOPS peak)
20.07.2016 19:15:55 | | OpenCL: NVIDIA GPU 0: GeForce GT 540M (driver version 368.39, device version OpenCL 1.1 CUDA, 1024MB, 970MB available, 258 GFLOPS peak)
20.07.2016 19:15:55 | | OpenCL CPU: Intel(R) Core(TM) i3 CPU M 390 @ 2.67GHz (OpenCL driver vendor: Advanced Micro Devices, Inc., driver version 2.0, device version OpenCL 1.1 AMD-APP (831.4))
20.07.2016 19:15:55 | | OpenCL CPU: Intel(R) Core(TM) i3 CPU M 390 @ 2.67GHz (OpenCL driver vendor: Intel(R) Corporation, driver version 1.1, device version OpenCL 1.1 (Build 31360.31441))
20.07.2016 19:15:55 | DistrRTgen | Found app_info.xml; using anonymous platform
20.07.2016 19:15:55 | SETI@home | Found app_info.xml; using anonymous platform
20.07.2016 19:15:55 | PrimeGrid | Found app_info.xml; using anonymous platform
20.07.2016 19:15:55 | | Host name: dora
20.07.2016 19:15:55 | | Processor: 4 GenuineIntel Intel(R) Core(TM) i3 CPU M 390 @ 2.67GHz [Family 6 Model 37 Stepping 5]
20.07.2016 19:15:55 | | 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 cx16 sse4_1 sse4_2 popcnt syscall nx lm vmx tm2 pbe
20.07.2016 19:15:55 | | OS: Microsoft Windows 7: Home Premium x64 Edition, Service Pack 1, (06.01.7601.00)
20.07.2016 19:15:55 | | Memory: 3.80 GB physical, 9.50 GB virtual
20.07.2016 19:15:55 | | Disk: 546.24 GB total, 215.83 GB free
20.07.2016 19:15:55 | | Local time is UTC +2 hours
20.07.2016 19:15:55 | | Config: simulate 4 CPUs
20.07.2016 19:15:55 | | Config: use all coprocessors
20.07.2016 19:15:55 | DistrRTgen | URL http://boinc.freerainbowtables.com/distrrtgen/; Computer ID 42527; resource share 100
20.07.2016 19:15:55 | SETI@home | URL http://setiathome.berkeley.edu/; Computer ID 6023152; resource share 100
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Anyhow curious....
Any ideas ?