I've searched the forums but not finding my problem dealt with. I'm getting almost daily BSOD and trying to decide whether to take the time to do a complete reinstall or send the computer back. Here's the history: I recently upgraded from a Dell INspiron notebook running 32-bit Vista to an HP Pavilion Quad core notebook running Factory installed Windows 7 Home Premium. (full details below) Within a day of installing my suite of software, data, etc. that had been running without issues on the Inspiron, I started getting random BSOD and system reboot, about once a day, and 95% of the time when the system was idle for a while. BlueScreen View reported the BSOD BUg was: DRIVER_IRQL_NOT_LESS_OR_EQUAL and listed this driver: NETw5s64.sys This happened about once per day, but not always the same. 9 out of 10 was above, but there were a few which referenced the Nvidia driver: SYSTEM_THREAD_EXCEPTION_NOT_HANDLED referencing this driver: nvlddmkm.sys After consulting HP, we did the following: 1) Hard disk and memory check - passed 2) Updated WiFI drivers to latest 3) Flashed Bios to latest The problem did not go away. Then about 4 days ago I stopped getting any BSOD. Until yesterday! Now I am getting a new bug: KMODE_EXCEPTION_NOT_HANDLED listing this driver: tcpip.sys And again it is about once per day. I tend to believe there is faulty hardware in the WiFI controller. So I am hesitant to waste a day reinstalling everything. I work from home and this is my work computer, so I also do not want to send it in for repair. I have until January 15th to return for a full refund, which might be a better option. So my question is whether this is likely to be software or hardware? If it is software would I be better off with Vista? or 32 bit Windows 7? Here is the system info on the machine: OS Name Microsoft Windows 7 Home Premium Version 6.1.7600 Build 7600 Other OS Description Not Available OS Manufacturer Microsoft Corporation System Manufacturer Hewlett-Packard System Model HP Pavilion dv7 Notebook PC System Type x64-based PC Processor Intel(R) Core(TM) i7 CPU Q 720 @ 1.60GHz, 1600 Mhz, 4 Core(s), 8 Logical Processor(s) BIOS Version/Date Hewlett-Packard F.13, 12/3/2009 SMBIOS Version 2.6 Hardware Abstraction Layer Version = "6.1.7600.16385" Installed Physical Memory (RAM) 8.00 GB Any help, suggestions from anyone is most appreciated.