ok i have sorted of figured this out, it seems that this particular driver ndis.sys is spending most of the time in the dpc's. here is the report from rattv3 showing this. i have a look around and it seems this is to do with the network, any ideas of what i can do with this info?
Cumulative Histogram for: NDIS.sys (NDIS.sys)
#, Range, Label, ISR Count, DPC Count, DPCTmr Count
0, 0.00us to 0.99us, <1.00us, 0, 0, 11
1, 1.00us to 1.99us, <2.00us, 604, 0, 882
2, 2.00us to 2.99us, <3.00us, 5, 0, 618
3, 3.00us to 3.99us, <4.00us, 10, 0, 466
4, 4.00us to 4.99us, <5.00us, 6, 0, 201
5, 5.00us to 5.99us, <6.00us, 2, 0, 78
6, 6.00us to 6.99us, <7.00us, 10, 0, 101
7, 7.00us to 7.99us, <8.00us, 394, 0, 166
8, 8.00us to 8.99us, <9.00us, 55, 167, 308
9, 9.00us to 9.99us, <10.00us, 2649997, 10, 419
10, 10.00us to 19.99us, <20.00us, 1784785, 32340, 6066
11, 20.00us to 29.99us, <30.00us, 2903, 4367734, 1229
12, 30.00us to 39.99us, <40.00us, 108, 25244, 144
13, 40.00us to 49.99us, <50.00us, 19, 9147, 76
14, 50.00us to 59.99us, <60.00us, 2, 1865, 83
15, 60.00us to 69.99us, <70.00us, 0, 840, 71
16, 70.00us to 79.99us, <80.00us, 0, 431, 34
17, 80.00us to 89.99us, <90.00us, 0, 135, 18
18, 90.00us to 99.99us, <100.00us, 0, 64, 2
19, 100.00us to 109.99us, <110.00us, 0, 48, 2
20, 110.00us to 119.99us, <120.00us, 0, 19, 1
21, 120.00us to 129.99us, <130.00us, 0, 6, 1
22, 130.00us to 139.99us, <140.00us, 0, 5, 1
23, 140.00us to 149.99us, <150.00us, 0, 4, 0
24, 150.00us to 159.99us, <160.00us, 0, 3, 0
25, 160.00us to 169.99us, <170.00us, 0, 1, 0
26, 170.00us to 179.99us, <180.00us, 0, 2, 0
27, 180.00us to 189.99us, <190.00us, 0, 2, 122
28, 190.00us to 199.99us, <200.00us, 0, 1, 121
29, 200.00us to 209.99us, <210.00us, 0, 0, 54
30, 210.00us to 219.99us, <220.00us, 0, 0, 36
31, 220.00us to 229.99us, <230.00us, 0, 0, 30
32, 230.00us to 239.99us, <240.00us, 0, 0, 23
33, 240.00us to 249.99us, <250.00us, 0, 0, 11
34, 250.00us to 259.99us, <260.00us, 0, 0, 21
35, 260.00us to 269.99us, <270.00us, 0, 0, 14
36, 270.00us to 279.99us, <280.00us, 0, 0, 12
37, 280.00us to 289.99us, <290.00us, 0, 0, 4
39, 300.00us to 309.99us, <310.00us, 0, 0, 1
42, 330.00us to 339.99us, <340.00us, 0, 0, 1
145, 1.36ms to 1.37ms, <1.37ms, 0, 0, 6
146, 1.37ms to 1.38ms, <1.38ms, 0, 0, 31
147, 1.38ms to 1.39ms, <1.39ms, 0, 0, 31
148, 1.39ms to 1.40ms, <1.40ms, 0, 1, 25
149, 1.40ms to 1.41ms, <1.41ms, 0, 1, 31
150, 1.41ms to 1.42ms, <1.42ms, 0, 0, 24
151, 1.42ms to 1.43ms, <1.43ms, 0, 0, 23
152, 1.43ms to 1.44ms, <1.44ms, 0, 0, 8
153, 1.44ms to 1.45ms, <1.45ms, 0, 2, 4
154, 1.45ms to 1.46ms, <1.46ms, 0, 1, 1
155, 1.46ms to 1.47ms, <1.47ms, 0, 1, 1
156, 1.47ms to 1.48ms, <1.48ms, 0, 1, 3
157, 1.48ms to 1.49ms, <1.49ms, 0, 5, 1
158, 1.49ms to 1.50ms, <1.50ms, 0, 13, 0
159, 1.50ms to 1.51ms, <1.51ms, 0, 47, 1
160, 1.51ms to 1.52ms, <1.52ms, 0, 56, 0
161, 1.52ms to 1.53ms, <1.53ms, 0, 40, 0
162, 1.53ms to 1.54ms, <1.54ms, 0, 14, 0
163, 1.54ms to 1.55ms, <1.55ms, 0, 10, 0
164, 1.55ms to 1.56ms, <1.56ms, 0, 4, 1
165, 1.56ms to 1.57ms, <1.57ms, 0, 1, 0
171, 1.62ms to 1.63ms, <1.63ms, 0, 2, 0
173, 1.64ms to 1.65ms, <1.65ms, 0, 3, 0
175, 1.66ms to 1.67ms, <1.67ms, 0, 1, 0
176, 1.67ms to 1.68ms, <1.68ms, 0, 1, 0
181, 1.72ms to 1.73ms, <1.73ms, 0, 1, 0
185, 1.76ms to 1.77ms, <1.77ms, 0, 1, 0
TOTALS, 4438900, 4438274, 11619
