What can I eliminate to improve conputer performance - list attached

Hello,
   Recently my machine, Dell Latitude E6400 with 4 GB RAM and a Intel Core 2 Duo 2.40GHz, has been suffering bouts of sluggishness (high CPU usage).  I captured the info below with ProcessExplorer during one of these bouts:

Process	PID	CPU	Private Bytes	Working Set	Description	Company Name
System Idle Process	0		0 K	24 K		
 Interrupts	n/a	0.57	0 K	0 K	Hardware Interrupts	
 DPCs	n/a		0 K	0 K	Deferred Procedure Calls	
 System	4	4.14	336 K	110,088 K		
  smss.exe	420		420 K	1,124 K	Windows Session Manager	Microsoft Corporation
csrss.exe	556		2,044 K	4,200 K	Client Server Runtime Process	Microsoft Corporation
 conhost.exe	1648		1,016 K	3,056 K	Console Window Host	Microsoft Corporation
wininit.exe	632		1,488 K	4,492 K	Windows Start-Up Application	Microsoft Corporation
 avgchsva.exe	656	0.75	29,080 K	2,416 K	AVG Cache Server	AVG Technologies CZ, s.r.o.
 avgrsa.exe	680		2,656 K	1,100 K	AVG Resident Shield Service	AVG Technologies CZ, s.r.o.
  avgcsrva.exe	932	0.38	11,856 K	7,064 K	AVG Scanning Core Module - Server Part	AVG Technologies CZ, s.r.o.
 services.exe	788		6,240 K	9,924 K	Services and Controller app	Microsoft Corporation
  svchost.exe	960		4,100 K	9,236 K	Host Process for Windows Services	Microsoft Corporation
  svchost.exe	584		4,356 K	8,436 K	Host Process for Windows Services	Microsoft Corporation
  svchost.exe	1032		19,108 K	21,164 K	Host Process for Windows Services	Microsoft Corporation
   audiodg.exe	1212		16,504 K	16,576 K	Windows Audio Device Graph Isolation 	Microsoft Corporation
  svchost.exe	1104	10.93	78,864 K	89,412 K	Host Process for Windows Services	Microsoft Corporation
   WUDFHost.exe	1432		1,644 K	4,980 K	Windows Driver Foundation - User-mode Driver Framework Host Process	Microsoft Corporation
   dwm.exe	3732	6.03	73,736 K	60,124 K	Desktop Window Manager	Microsoft Corporation
  svchost.exe	1144		17,492 K	32,884 K	Host Process for Windows Services	Microsoft Corporation
  svchost.exe	1316	4.52	10,164 K	17,544 K	Host Process for Windows Services	Microsoft Corporation
  svchost.exe	1516		10,348 K	13,872 K	Host Process for Windows Services	Microsoft Corporation
  spoolsv.exe	1680	1.88	9,984 K	16,792 K	Spooler SubSystem App	Microsoft Corporation
  svchost.exe	1712	3.01	9,060 K	17,212 K	Host Process for Windows Services	Microsoft Corporation
  svchost.exe	1744	1.51	15,048 K	16,732 K	Host Process for Windows Services	Microsoft Corporation
  schedul2.exe	2008		1,916 K	5,400 K	Acronis Scheduler 2	Acronis
  afcdpsrv.exe	2036		1,768 K	5,192 K	File Level CDP Manager Service	Acronis
  lmgrd.exe	1264		1,648 K	3,736 K		Acresso Software Inc.
   lmgrd.exe	1140		2,152 K	5,624 K		Acresso Software Inc.
    ARCGIS.EXE	2308		2,572 K	6,188 K		
  avgwdsvc.exe	1588	1.13	6,916 K	3,028 K	AVG Watchdog Service	AVG Technologies CZ, s.r.o.
   avgnsa.exe	2448		2,252 K	2,448 K	AVG Network scanner Service	AVG Technologies CZ, s.r.o.
  svchost.exe	1736		2,984 K	7,780 K	Host Process for Windows Services	Microsoft Corporation
  svchost.exe	2064		1,152 K	3,592 K	Host Process for Windows Services	Microsoft Corporation
  NMSAccessU.exe	2144		916 K	2,976 K		
  svchost.exe	2256		1,148 K	3,588 K	Host Process for Windows Services	Microsoft Corporation
  svchost.exe	2660		1,800 K	5,468 K	Host Process for Windows Services	Microsoft Corporation
  TeamViewer_Service.exe	2684		1,140 K	3,732 K	TeamViewer Service	TeamViewer GmbH
  avgemc.exe	2728		6,136 K	832 K	AVG E-Mail Scanner	AVG Technologies CZ, s.r.o.
   avgcsrvx.exe	2892		4,900 K	7,816 K	AVG Scanning Core Module - Server Part	AVG Technologies CZ, s.r.o.
  SDWinSec.exe	2828		4,228 K	8,404 K	Spybot-S&D Security Center integration	Safer Networking Ltd.
  svchost.exe	1612		3,820 K	7,876 K	Host Process for Windows Services	Microsoft Corporation
  taskhost.exe	3684		3,168 K	7,404 K	Host Process for Windows Tasks	Microsoft Corporation
  svchost.exe	3188		3,076 K	7,780 K	Host Process for Windows Services	Microsoft Corporation
  SearchIndexer.exe	3828		35,496 K	17,936 K	Microsoft Windows Search Indexer	Microsoft Corporation
   SearchProtocolHost.exe	3376		3,172 K	7,844 K	Microsoft Windows Search Protocol Host	Microsoft Corporation
   SearchFilterHost.exe	4032		2,380 K	5,904 K	Microsoft Windows Search Filter Host	Microsoft Corporation
  wmpnetwk.exe	2020		12,456 K	12,056 K	Windows Media Player Network Sharing Service	Microsoft Corporation
  svchost.exe	4184		9,648 K	13,204 K	Host Process for Windows Services	Microsoft Corporation
  svchost.exe	2944		988 K	2,712 K	Host Process for Windows Services	Microsoft Corporation
 lsass.exe	796	2.26	4,424 K	11,920 K	Local Security Authority Process	Microsoft Corporation
 lsm.exe	804		2,372 K	4,124 K	Local Session Manager Service	Microsoft Corporation
csrss.exe	648	1.51	2,216 K	46,672 K	Client Server Runtime Process	Microsoft Corporation
winlogon.exe	728		2,864 K	7,008 K	Windows Logon Application	Microsoft Corporation
explorer.exe	3764	10.17	56,820 K	86,832 K	Windows Explorer	Microsoft Corporation
 schedhlp.exe	4044		1,344 K	4,948 K	Acronis Scheduler Helper	Acronis
 wmdc.exe	4084		2,320 K	6,940 K	Windows Mobile Device Center	Microsoft Corporation
 igfxtray.exe	3196		2,312 K	6,488 K	igfxTray Module	Intel Corporation
 hkcmd.exe	3252		2,972 K	10,048 K	hkcmd Module	Intel Corporation
 igfxpers.exe	344		2,128 K	6,520 K	persistence Module	Intel Corporation
 firefox.exe	896	3.39	108,860 K	132,508 K	Firefox	Mozilla Corporation
  plugin-container.exe	4588	6.41	177,216 K	141,604 K	Plugin Container for Firefox	Mozilla Corporation
  plugin-container.exe	3680	0.38	18,184 K	23,556 K	Plugin Container for Firefox	Mozilla Corporation
 procexp.exe	1904		1,760 K	6,144 K	Sysinternals Process Explorer	Sysinternals - www.sysinternals.com
  procexp64.exe	4572	31.27	20,136 K	38,376 K	Sysinternals Process Explorer	Sysinternals - www.sysinternals.com
avgtray.exe	2964		5,708 K	2,156 K	AVG Tray Monitor	AVG Technologies CZ, s.r.o.
TrueImageMonitor.exe	2932		10,020 K	11,260 K	Acronis True Image Monitor	Acronis
BrStsW64.exe	3460	4.52	2,252 K	7,812 K	brstswnd	brother
 brpjp04a.exe	2592	1.51	1,744 K	5,292 K	brcdcmon	brother
jusched.exe	3492		1,644 K	6,652 K	Java(TM) Update Scheduler	Sun Microsystems, Inc.
 jucheck.exe	2116		2,488 K	8,732 K	Java(TM) Update Checker	Sun Microsystems, Inc.

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Can I remove or modify any of the above to improve performance? If so which ones and how?

Thanks,
JE