Hi all, my computer has started to disconnect from wireless networks randomly.

I am running Windows Vista with:

Spoiler: show

------------------
System Information
------------------
Time of this report: 5/19/2009, 10:53:06
Machine name: AREW-PC
Operating System: Windows Vista™ Home Premium (6.0, Build 6001) Service Pack 1 (6001.vistasp1_gdr.090302-1506)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Inspiron 1720
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A08
Processor: Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz (2 CPUs), ~2.0GHz
Memory: 3582MB RAM
Page File: 1778MB used, 5569MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6001.18000 32bit Unicode

---------------
Display Devices
---------------
Card name: NVIDIA GeForce 8600M GT
Manufacturer: NVIDIA
Chip type: GeForce 8600M GT
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0407&SUBSYS_01F21028&REV_A1
Display Memory: 1774 MB
Dedicated Memory: 239 MB
Shared Memory: 1535 MB
Current Mode: 1440 x 900 (32 bit) (60Hz)
Monitor: Generic PnP Monitor
Driver Name: nvd3dum.dll,nvwgf2um.dll
Driver Version: 7.15.0011.6917 (English)
DDI Version: 10
Driver Attributes: Final Retail
Driver Date/Size: 11/26/2007 19:52:00, 5263360 bytes
WHQL Logo'd: No
WHQL Date Stamp: None
Device Identifier: {D7B71E3E-4747-11CF-9D68-F92101C2CA35}
Vendor ID: 0x10DE
Device ID: 0x0407
SubSys ID: 0x01F21028
Revision ID: 0x00A1
Revision ID: 0x00A1
Video Accel: ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C ModeVC1_B ModeWMV9_B ModeVC1_A ModeWMV9_A

--------------
System Devices
--------------
Name: Intel(R) Wireless WiFi Link 4965AGN
Device ID: PCI\VEN_8086&DEV_4229&SUBSYS_11208086&REV_61\4&36D F81F4&0&00E1
Driver: n/a

Name: Mobile Intel(R) PM965/GM965/GL960 Express PCI Express Root Port - 2A01
Device ID: PCI\VEN_8086&DEV_2A01&SUBSYS_01F21028&REV_0C\3&2B8 E0B4B&0&08
Driver: C:\Windows\system32\DRIVERS\pci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:01, 151096 bytes

Name: Mobile Intel(R) PM965/GM965/GL960 Express Processor to DRAM Controller - 2A00
Device ID: PCI\VEN_8086&DEV_2A00&SUBSYS_01F21028&REV_0C\3&2B8 E0B4B&0&00
Driver: n/a

Name: Intel(R) ICH8M Ultra ATA Storage Controllers - 2850
Device ID: PCI\VEN_8086&DEV_2850&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&F9
Driver: C:\Windows\system32\DRIVERS\intelide.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:00, 17976 bytes
Driver: C:\Windows\system32\DRIVERS\pciidex.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:00, 45112 bytes
Driver: C:\Windows\system32\DRIVERS\atapi.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:00, 21560 bytes
Driver: C:\Windows\system32\DRIVERS\ataport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:00, 110136 bytes

Name: High Definition Audio Controller
Device ID: PCI\VEN_8086&DEV_284B&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&D8
Driver: C:\Windows\system32\DRIVERS\hdaudbus.sys, 6.00.6001.17036 (English), 1/20/2008 22:23:22, 53760 bytes

Name: Intel(R) ICH8 Family PCI Express Root Port 4 - 2845
Device ID: PCI\VEN_8086&DEV_2845&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&E3
Driver: C:\Windows\system32\DRIVERS\pci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:01, 151096 bytes

Name: Intel(R) ICH8 Family PCI Express Root Port 2 - 2841
Device ID: PCI\VEN_8086&DEV_2841&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&E1
Driver: C:\Windows\system32\DRIVERS\pci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:01, 151096 bytes

Name: Intel(R) ICH8 Family PCI Express Root Port 1 - 283F
Device ID: PCI\VEN_8086&DEV_283F&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&E0
Driver: C:\Windows\system32\DRIVERS\pci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:01, 151096 bytes

Name: Intel(R) ICH8 Family SMBus Controller - 283E
Device ID: PCI\VEN_8086&DEV_283E&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&FB
Driver: n/a

Name: Intel(R) ICH8 Family USB2 Enhanced Host Controller - 283A
Device ID: PCI\VEN_8086&DEV_283A&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&D7
Driver: C:\Windows\system32\drivers\usbehci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 39424 bytes
Driver: C:\Windows\system32\drivers\usbport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 226304 bytes
Driver: C:\Windows\system32\drivers\usbhub.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 194560 bytes
Driver: C:\Windows\system32\hccoin.dll, 6.00.6000.16386 (English), 11/2/2006 05:46:05, 8704 bytes
Driver: C:\Windows\system32\hcrstco.dll, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 15872 bytes

Name: Intel(R) ICH8 Family USB2 Enhanced Host Controller - 2836
Device ID: PCI\VEN_8086&DEV_2836&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&EF
Driver: C:\Windows\system32\drivers\usbehci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 39424 bytes
Driver: C:\Windows\system32\drivers\usbport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 226304 bytes
Driver: C:\Windows\system32\drivers\usbhub.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 194560 bytes
Driver: C:\Windows\system32\hccoin.dll, 6.00.6000.16386 (English), 11/2/2006 05:46:05, 8704 bytes
Driver: C:\Windows\system32\hcrstco.dll, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 15872 bytes

Name: Intel(R) ICH8 Family USB Universal Host Controller - 2835
Device ID: PCI\VEN_8086&DEV_2835&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&D1
Driver: C:\Windows\system32\drivers\usbuhci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 23552 bytes
Driver: C:\Windows\system32\drivers\usbport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 226304 bytes
Driver: C:\Windows\system32\drivers\usbhub.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 194560 bytes
Driver: C:\Windows\system32\hcrstco.dll, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 15872 bytes

Name: Intel(R) ICH8 Family USB Universal Host Controller - 2834
Device ID: PCI\VEN_8086&DEV_2834&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&D0
Driver: C:\Windows\system32\drivers\usbuhci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 23552 bytes
Driver: C:\Windows\system32\drivers\usbport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 226304 bytes
Driver: C:\Windows\system32\drivers\usbhub.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 194560 bytes
Driver: C:\Windows\system32\hcrstco.dll, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 15872 bytes

Name: Intel(R) ICH8 Family USB Universal Host Controller - 2832
Device ID: PCI\VEN_8086&DEV_2832&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&EA
Driver: C:\Windows\system32\drivers\usbuhci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 23552 bytes
Driver: C:\Windows\system32\drivers\usbport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 226304 bytes
Driver: C:\Windows\system32\drivers\usbhub.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 194560 bytes
Driver: C:\Windows\system32\hcrstco.dll, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 15872 bytes

Name: Intel(R) ICH8 Family USB Universal Host Controller - 2831
Device ID: PCI\VEN_8086&DEV_2831&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&E9
Driver: C:\Windows\system32\drivers\usbuhci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 23552 bytes
Driver: C:\Windows\system32\drivers\usbport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 226304 bytes
Driver: C:\Windows\system32\drivers\usbhub.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 194560 bytes
Driver: C:\Windows\system32\hcrstco.dll, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 15872 bytes

Name: Intel(R) ICH8 Family USB Universal Host Controller - 2830
Device ID: PCI\VEN_8086&DEV_2830&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&E8
Driver: C:\Windows\system32\drivers\usbuhci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 23552 bytes
Driver: C:\Windows\system32\drivers\usbport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 226304 bytes
Driver: C:\Windows\system32\drivers\usbhub.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 194560 bytes
Driver: C:\Windows\system32\hcrstco.dll, 6.00.6001.18000 (English), 1/20/2008 22:23:03, 15872 bytes

Name: Intel(R) ICH8M 3 port Serial ATA Storage Controller - 2828
Device ID: PCI\VEN_8086&DEV_2828&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&FA
Driver: C:\Windows\system32\DRIVERS\intelide.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:00, 17976 bytes
Driver: C:\Windows\system32\DRIVERS\pciidex.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:00, 45112 bytes
Driver: C:\Windows\system32\DRIVERS\atapi.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:00, 21560 bytes
Driver: C:\Windows\system32\DRIVERS\ataport.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:00, 110136 bytes

Name: Intel(R) ICH8M LPC Interface Controller - 2815
Device ID: PCI\VEN_8086&DEV_2815&SUBSYS_01F21028&REV_02\3&2B8 E0B4B&0&F8
Driver: C:\Windows\system32\DRIVERS\msisadrv.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:01, 16440 bytes

Name: Intel(R) 82801 PCI Bridge - 2448
Device ID: PCI\VEN_8086&DEV_2448&SUBSYS_01F21028&REV_F2\3&2B8 E0B4B&0&F0
Driver: C:\Windows\system32\DRIVERS\pci.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:01, 151096 bytes

Name: Broadcom 440x 10/100 Integrated Controller
Device ID: PCI\VEN_14E4&DEV_170C&SUBSYS_01F21028&REV_02\4&304 90591&0&00F0
Driver: n/a

Name: Ricoh xD-Picture Card Controller
Device ID: PCI\VEN_1180&DEV_0852&SUBSYS_01F21028&REV_12\4&304 90591&0&0CF0
Driver: C:\Windows\system32\DRIVERS\rixdptsk.sys, 6.00.0001.0000 (Japanese), 11/14/2006 17:35:20, 37376 bytes
Driver: C:\Windows\system32\rixdicon.dll, 5/6/2005 19:06:00, 16480 bytes

Name: Ricoh MMC Host Controller
Device ID: PCI\VEN_1180&DEV_0843&SUBSYS_01F21028&REV_12\4&304 90591&0&0AF0
Driver: C:\Windows\system32\DRIVERS\rimmptsk.sys, 1.00.0000.0009 (Japanese), 11/16/2005 20:28:32, 28928 bytes

Name: RICOH OHCI Compliant IEEE 1394 Host Controller
Device ID: PCI\VEN_1180&DEV_0832&SUBSYS_01F21028&REV_05\4&304 90591&0&08F0
Driver: C:\Windows\system32\DRIVERS\ohci1394.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:21, 61952 bytes
Driver: C:\Windows\system32\DRIVERS\1394bus.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:21, 53376 bytes

Name: SDA Standard Compliant SD Host Controller
Device ID: PCI\VEN_1180&DEV_0822&SUBSYS_01F21028&REV_22\4&304 90591&0&09F0
Driver: C:\Windows\system32\DRIVERS\sdbus.sys, 6.00.6001.18000 (English), 1/20/2008 22:23:21, 88576 bytes

Name: Ricoh Memory Stick Host Controller
Device ID: PCI\VEN_1180&DEV_0592&SUBSYS_01F21028&REV_12\4&304 90591&0&0BF0
Driver: C:\Windows\system32\snymsico.dll, 1.00.0000.9120 (English), 9/3/2004 12:00:00, 90112 bytes
Driver: C:\Windows\system32\DRIVERS\rimsptsk.sys, 1.00.0002.0005 (Japanese), 12/22/2005 17:02:22, 51840 bytes

Name: NVIDIA GeForce 8600M GT


My connection icon at the bottom of the screen is a constant red "x" and it says

"Connection status: unknown

The specified service does not exist as an installed service."

Thanks for any help you can give me.