I have the same problem. Task Manager -> Analyze wait chain shows the NB PID waiting for approx 100 threads.
I don't know if any of these helps you, but procmon shows 1020 handles, 269 GDI handles, 153 user handles
Threads:
TID, CPU, Cycles delta, Start Address, Priority
5468, 0.02, 4,007,853, NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Below normal
4812, , 372,039, NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
7060, , 321,790, NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
10824, , 270,176, NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Above normal
9120, , 153,427, NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
2460, , 150,242, NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
10964, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
10584, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
10464, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
10412, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
10096, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
10092, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
10044, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9996, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9972, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9928, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9884, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9820, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9760, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9728, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9696, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9692, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9668, , , ntdll.dll!TpPostWork+0x3a0, Normal
9656, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9412, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9276, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9072, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
9028, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8784, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8780, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8596, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8488, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8440, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8356, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8296, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8236, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
8008, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
7920, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
7800, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
7788, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
7360, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
7164, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
6976, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
6936, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
6848, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
6816, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
6736, , , ntdll.dll!TpPostWork+0x3a0, Normal
6612, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
6428, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
6400, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
6236, , , ntdll.dll!TpPostWork+0x3a0, Normal
5984, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
5964, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
5796, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
5748, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
5688, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
5684, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
5452, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
5188, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
4896, , , ntdll.dll!TpPostWork+0x3a0, Normal
4844, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x14ce90, Normal
4772, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
4736, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
4676, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
4392, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
4236, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
4200, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
3936, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Below normal
3476, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
3212, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
3060, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
3052, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
2896, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
2876, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
2796, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
2432, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
2340, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
2188, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
2024, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
1188, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
1056, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
1008, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Below normal
960, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal
888, , , ntdll.dll!TpPostWork+0x3a0, Normal
736, , , NewsbinPro64.exe!LibContentFilter::CContentFilterEngine::ECF_UNIT_TEST+0x167fd8, Normal