Hello all: Running a 2006 vintage Compaq Presario C502CA with Celeron M440, 1.86 GHz, 1.5 GB ram. Originally came with Vista Home Basic 32bit, I installed Win8 preview in July 2012 & it ran fine without issue. Did the Win8Pro upgrade a couple weeks ago & all semms well except that when I try to establish an internet connection, it crashes & reboots [no BSOD]. Here's the CrashMe output: System Information (local) computer name: TERRY windows version: Windows 8 , 6.2, build: 9200 windows dir: C:\WINDOWS CPU: GenuineIntel Intel(R) Celeron(R) M CPU 440 @ 1.86GHz Intel586, level: 6 1 logical processors, active mask: 1 RAM: 1600245760 total VM: 2147352576, free: 1944559616 Crash Dump Analysis Crash dump directory: C:\WINDOWS\Minidump Crash dumps are enabled on your computer. On Fri 2013-01-25 8:26:55 AM GMT your computer crashed crash dump file: C:\WINDOWS\Minidump\012513-15506-01.dmp This was probably caused by the following module: ndis.sys (ndis+0x2EDF8) Bugcheck code: 0xD1 (0x1D, 0x2, 0x0, 0xFFFFFFFF87E35DF8) Error: DRIVER_IRQL_NOT_LESS_OR_EQUAL file path: C:\WINDOWS\system32\drivers\ndis.sys product: Microsoft® Windows® Operating System company: Microsoft Corporation description: NDIS 6.30 driver Bug check description: This indicates that a kernel-mode driver attempted to access pageable memory at a process IRQL that was too high. This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system that cannot be identified at this time. Here's the LAN driver: ================================================== Driver Name : Rtnicxp.sys Address : 0x8DF1C000 End Address : 0x8DF2B000 Size : 0x0000f000 Load Count : 1 Index : 93 File Type : Network Driver Description : Realtek 10/100 NDIS 5.1 Driver Version : 6.109.530.2008 Company : Realtek Semiconductor Corporation Product Name : Realtek 10/100 NIC Family all in one NDIS Driver Modified Date : 2012-06-02 6:32:01 AM Created Date : 2012-06-02 6:32:01 AM Filename : C:\WINDOWS\system32\DRIVERS\Rtnicxp.sys File Attributes : A Service Name : RTL8023xp Service Display Name: @netrtl32.inf,%Rtlnicxp.Service.DispName%;Realtek 10/100 NIC Family NDIS x86 Driver ================================================== Upon the advice of HP support, Win Defender & firewall have been disabled, no other anti-malware is installed. HP advises that the latest driver for the Realtek chip is included in Win 8Pro, so I am at a loss. Can someone help with this?