Intel Pro Wireless 3945BG Problem - Crashing Windows

I'm having a problem with my Intel wireless card (I assume) on my Toshiba Laptop.

I can connect fine and all that, but when I unplug the power from my router or cable modem (usually both at the same time, sometimes my internet goes down and I need to restart it), my laptop will lose the internet connection and and my laptop will become very slow, almost to the point of a lock up. At this point I have to force my laptop to shut down (hold down on the power button) and restart...The internet works fine after that (the power is now back to my modem and router)

Here is some info of Everest:

Computer
Operating System Microsoft Windows XP Home Edition
OS Service Pack Service Pack 2
DirectX 4.09.00.0904 (DirectX 9.0c)

Motherboard
CPU Type Mobile Intel Pentium M, 1866 MHz (14 x 133)
Motherboard Name Unknown
Motherboard Chipset Intel Calistoga i945GM/PM
System Memory 1013 MB (DDR2-533 DDR2 SDRAM)
BIOS Type Phoenix (06/12/06)

Display
Video Adapter Mobile Intel(R) 945GM Express Chipset Family (128 MB)
Video Adapter Mobile Intel(R) 945GM Express Chipset Family (128 MB)
Monitor Plug and Play Monitor [NoDB]
Monitor Plug and Play Monitor [NoDB]
Monitor Generic Television
Monitor Generic Television

Multimedia
Audio Adapter Intel 82801GBM ICH7-M - High Definition Audio Controller

Storage
IDE Controller Intel(R) 82801GBM/GHM (ICH7-M Family) Serial ATA Storage Controller - 27C4
IDE Controller Texas Instruments PCIxx12 Integrated FlashMedia Controller
Disk Drive HTS541080G9SA00 (80 GB, 5400 RPM, SATA)
Optical Drive MATSHITA DVD-RAM UJ-841S
SMART Hard Disks Status OK

Input
Keyboard Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
Mouse HID-compliant MX310 Optical Mouse
Mouse Synaptics PS/2 Port TouchPad

Network
Network Adapter Intel(R) PRO/100 VE Network Connection
Network Adapter Intel(R) PRO/Wireless 3945BG Network Connection (192.168.0.101)
Modem TOSHIBA Software Modem

Peripherals
Printer hp deskjet 940c
Printer HP Deskjet D4100 series
USB1 Controller Intel 82801GBM ICH7-M - USB Universal Host Controller
USB1 Controller Intel 82801GBM ICH7-M - USB Universal Host Controller
USB1 Controller Intel 82801GBM ICH7-M - USB Universal Host Controller
USB1 Controller Intel 82801GBM ICH7-M - USB Universal Host Controller
USB2 Controller Intel 82801GBM ICH7-M - Enhanced USB2 Controller
USB Device Logitech USB MX310 Optical Mouse
Battery Microsoft AC Adapter
Battery Microsoft ACPI-Compliant Control Method Battery

 

Well, it makes sense that you lose your internet connection when the cable modem and router and unplugged, then plugged back in. The PC loses contact due to the dropped signal. When you disconnect the modem and router, you should close your browser first. Then when the modem and router are plugged back in, start up the browser again. Keep in mind, there's a certain amount of time required to "reset" these devices, so let them cycle for a minute or two before trying to connect again. Many PCs will do strange things when the main source of the internet connection just drops out inexplicably and unexpectedly like that, so I personally don't think it's a problem with your hardware or your drivers. But, if you have to unplug your internet gear on a regular basis (like over twice a month) then something isn't right and I'd be talking to the provider about either a line test or new gear...