Studio 1555 wireless doesn't seem to be on

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Similar problem--wireless doesn't seem to be on.  WiFi network fine on other machine.  Was working fine on this  machine 4 days ago. In addition 1) internet on/off button on function key doesn't work, 2)  System internals says it is an AMD processor when in fact it is Intel, 3)CD eject button doesn't work. Gett messages wifi not running.

Here is system info:

OS Name Microsoft Windows 7 Home Premium Version 6.1.7601 Service Pack 1 Build 7601

Other OS Description Not Available

OS Manufacturer Microsoft Corporation

System Name xxxxxxxx

System Manufacturer Dell Inc.

System Model Studio 1555

System Type x64-based PC

Processor Intel(R) Core(TM)2 Duo CPU T6600 @ 2.20GHz, 2200 Mhz, 2 Core(s), 2 Logical Processor(s)

BIOS Version/Date Dell Inc. A13, 4/2/2011 SMBIOS Version 2.5

Windows Directory C:\Windows

System Directory C:\Windows\system32

Boot Device \Device\HarddiskVolume2

Locale United States

Hardware Abstraction Layer Version = "6.1.7601.17514"

User Name yyyyy-PC\yyyyy

Time Zone Eastern Standard Time

Installed Physical Memory (RAM) 4.00 GB

Total Physical Memory 3.84 GB

Available Physical Memory 2.73 GB

Total Virtual Memory 7.68 GB

Available Virtual Memory 6.39 GB

Page File Space 3.84 GB

Page File C:\pagefile.sys

--------------------------WI FI Info-------------------------------------------------------------------

Name [00000011] Intel(R) WiFi Link 5100 AGN Adapter Type Wireless 802.11

Product Type Intel(R) WiFi Link 5100 AGN

Installed Yes

PNP Device ID PCI\VEN_8086&DEV_4232&SUBSYS_13218086&REV_00\4&B04CCE1&0&00E1

Last Reset 12/19/2011 11:00 AM Index 11

Service Name NETw5v64 I-

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled Yes

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address 00:24:D6:09:2C:7E

Memory Address 0xF8000000-0xF8001FFF

IRQ Channel IRQ 4294967292

Driver c:\windows\system32\drivers\netw5v64.sys (12.4.1.11, 5.18 MB (5,435,904 bytes), 10/31/2009 10:32 AM)

Thanks