First attempt: outlook is runned 

 4496:20110401:213204.400 Processing request.
  4496:20110401:213204.572 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  4496:20110401:213204.572 In add_perf_counter() [counter:\Процесс(OUTLOOK)\Прошло времени (сек)] [interval:30]
  4496:20110401:213204.572 PerfCounter '\Процесс(OUTLOOK)\Прошло времени (сек)' successfully added. Interval 30 seconds
  4496:20110401:213204.587 Sending back [8.156302]
....
  3144:20110401:213208.806 Processing request.
  3144:20110401:213208.994 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  3144:20110401:213208.994 Sending back [10.570380]
....
  4496:20110401:213212.587 Processing request.
  4496:20110401:213212.712 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  4496:20110401:213212.712 Sending back [12.586018]
....
  3144:20110401:213218.275 Processing request.
  3144:20110401:213218.447 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  3144:20110401:213218.447 Sending back [15.105866]
****outlook manualy closed:
   392:20110401:213222.619 Call to PdhCollectQueryData() failed: Возвращаемые данные отсутствуют.
....
   392:20110401:213223.634 Call to PdhCollectQueryData() failed: Возвращаемые данные отсутствуют.
....
   392:20110401:213224.650 Call to PdhCollectQueryData() failed: Возвращаемые данные отсутствуют.
....
   392:20110401:213225.650 Call to PdhCollectQueryData() failed: Возвращаемые данные отсутствуют.
  2700:20110401:213226.431 Processing request.
....
  2700:20110401:213226.431 Processing request.
   392:20110401:213226.666 Call to PdhCollectQueryData() failed: Возвращаемые данные отсутствуют.
  2700:20110401:213226.697 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  2700:20110401:213226.697 Sending back [17.121433]
....
   392:20110401:213227.681 Call to PdhCollectQueryData() failed: Возвращаемые данные отсутствуют.
  4496:20110401:213228.134 Processing request.
  4496:20110401:213228.306 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  4496:20110401:213228.306 Sending back [17.121433]



Second attempt: outlook is ***NOT*** even runned 

  5508:20110401:214034.809 Processing request.
  5508:20110401:214034.950 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  5508:20110401:214034.950 In add_perf_counter() [counter:\Процесс(OUTLOOK)\Прошло времени (сек)] [interval:30]
  5508:20110401:214034.950 PerfCounter '\Процесс(OUTLOOK)\Прошло времени (сек)' successfully added. Interval 30 seconds
  5508:20110401:214034.950 Can't collect data "\Процесс(OUTLOOK)\Прошло времени (сек)": Возвращаемые данные отсутствуют.
  5508:20110401:214034.966 Sending back [ZBX_NOTSUPPORTED]
....
  2868:20110401:214036.341 Processing request.
  2868:20110401:214036.450 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  2868:20110401:214036.450 Sending back [0.000000]
....
  2868:20110401:214039.044 Processing request.
  2868:20110401:214039.169 Requested [perf_counter[\Процесс(OUTLOOK)\Прошло времени (сек),30]]
  2868:20110401:214039.169 Sending back [0.000000]



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

Counters can be erased only when service was restarted
  6136:20110401:214529.530 Processing request.
  6136:20110401:214529.764 Requested [perf_counter[\Очередь печати(_Total)\Всего напечатано страниц,6]]
  6136:20110401:214529.764 In add_perf_counter() [counter:\Очередь печати(_Total)\Всего напечатано страниц] [interval:6]
  6136:20110401:214529.764 PerfCounter '\Очередь печати(_Total)\Всего напечатано страниц' successfully added. Interval 6 seconds
  6136:20110401:214529.780 Sending back [6.000000]
....
   752:20110401:214543.577 Processing request.
   752:20110401:214543.749 Requested [perf_counter[\Очередь печати(_Total)\Всего напечатано страниц,6]]
   752:20110401:214543.749 Sending back [6.000000]
**** Spoller service is stoped
  4816:20110401:214742.281 Processing request.
  4816:20110401:214742.437 Requested [perf_counter[\Очередь печати(_Total)\Всего напечатано страниц,6]]
  4816:20110401:214742.453 Sending back [6.000000]
btw, mmc also display that walue


****poller service is started
  6136:20110401:214840.250 Processing request.
  6136:20110401:214840.375 Requested [perf_counter[\Очередь печати(_Total)\Всего напечатано страниц,6]]
  6136:20110401:214840.375 Sending back [0.000000]




*** latest zabbix_agent from ZBX-3547 branche ***
C:\Program Files\Zabbix Agent>zabbix_agentd.exe -V
Zabbix Agent Win32 (service) v1.8.5rc1 (revision {ZABBIX_REVISION}) (4 January 2011)
Compilation time: Apr  1 2011 16:52:20