I have updated to 7.6.33 and installed VirtualBox.
BOINC does not download a project from ATLAS@home. Checking that I found out, that my W10 home edition on a 64bit INTEL CPU believes that VirtualBox is a not compatible Software.

Anybody can help me?

Tks
Wolf

Here is the log_

15.12.2016 15:00:32 | | cc_config.xml not found - using defaults
15.12.2016 15:00:42 | | Starting BOINC client version 7.6.33 for windows_x86_64
15.12.2016 15:00:42 | | log flags: file_xfer, sched_ops, task
15.12.2016 15:00:43 | | Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8
15.12.2016 15:00:43 | | Data directory: C:\ProgramData\BOINC
15.12.2016 15:00:43 | | Running under account wolfk
15.12.2016 15:00:58 | | OpenCL: Intel GPU 0: Intel(R) HD Graphics (driver version 20.19.15.4444, device version OpenCL 1.2, 1566MB, 1566MB available, 90 GFLOPS peak)
15.12.2016 15:00:58 | | OpenCL CPU: Intel(R) Pentium(R) CPU N3700 @ 1.60GHz (OpenCL driver vendor: Intel(R) Corporation, driver version 5.2.0.10094, device version OpenCL 1.2 (Build 10094))
15.12.2016 15:01:00 | | Host name: Segelwolf1
15.12.2016 15:01:00 | | Processor: 4 GenuineIntel Intel(R) Pentium(R) CPU N3700 @ 1.60GHz [Family 6 Model 76 Stepping 3]
15.12.2016 15:01:00 | | 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 movebe popcnt aes rdrandsyscall nx lm vmx tm2 pbe smep
15.12.2016 15:01:00 | | OS: Microsoft Windows 10: Core x64 Edition, (10.00.14393.00)
15.12.2016 15:01:00 | | Memory: 3.84 GB physical, 5.03 GB virtual
15.12.2016 15:01:00 | | Disk: 930.35 GB total, 600.93 GB free
15.12.2016 15:01:00 | | Local time is UTC +1 hours
15.12.2016 15:01:00 | | VirtualBox version: 5.0.18
15.12.2016 15:01:00 | ATLAS@home | URL http://atlasathome.cern.ch/; Computer ID 66403; resource share 100
15.12.2016 15:01:00 | Milkyway@Home | URL http://milkyway.cs.rpi.edu/milkyway/; Computer ID 693538; resource share 100
15.12.2016 15:01:00 | Milkyway@Home | General prefs: from Milkyway@Home (last modified 25-Oct-2015 21:33:24)
15.12.2016 15:01:00 | Milkyway@Home | Host location: none
15.12.2016 15:01:00 | Milkyway@Home | General prefs: using your defaults
15.12.2016 15:01:00 | | Reading preferences override file
15.12.2016 15:01:00 | | Preferences:
15.12.2016 15:01:00 | | max memory usage when active: 1967.72MB
15.12.2016 15:01:00 | | max memory usage when idle: 3541.89MB
15.12.2016 15:01:01 | | max disk usage: 601.25GB
15.12.2016 15:01:01 | | don't use GPU while active
15.12.2016 15:01:01 | | suspend work if non-BOINC CPU load exceeds 25%
15.12.2016 15:01:01 | | (to change preferences, visit a project web site or select Preferences in the Manager)
15.12.2016 15:01:01 | | Suspending GPU computation - computer is in use
15.12.2016 15:01:01 | ATLAS@home | Started download of ATLAS_vbox_2.00_image.vdi
15.12.2016 15:01:12 | | Suspending computation - CPU is busy

Although the BOINC installer includes the VirtualBox program, we're not the makers of VirtualBox. Any problems with it are best searched for and/or asked on the VirtualBox forums. I did do a search there, but it probably is easier to find information with the exact error message.

This does look to be a Windows 10 problem though, it being overzealous at security.

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There's a checklist for people who have problems with Atlas. You may need to update VirtualBox to latest version. I think after some Windows update 5.0 doesn't work any more.