multiple BSOD, almost always caused by ntoskrnl.exe+7cc40

Hello,

I must admit I'm completely lost by now and need help. The problem is, I have this notebookl: HP G72-b20SA Notebook PC Product Specifications HP G72-b20SA Notebook PC - HP Customer Care (United States - English) (HP G72-b20SA), and I'm getting random BSODs at completely random times. Usually is happens after cold start.

I think I've tried everything hardware-related. Memtest 16h test is ok, hdd seems ok too (SMART and HDtune), machina was in servise center and they replaced mainboard. But BSODs are still bumping up.

I'm running W7 64 Home Premium, retail version (hdd was wiped clean few moths ago, so there are no HP "goodies" left)

From what I was able to find, it seems like some sort of driver-memory related problem, but right now I have no idea what to look for.

Also, service center says (in short) "hardware ok, must be something in software you are using".

I do not see any really questionable software. K-Lite could cause problems if it was corrupted; codec packages are somewhat worrisome when they get corrupted. Other than that, nothing out of the ordinary.

I did see an out of date driver: netr28x.sys which is your Ralink RT2860 series Wireless LAN Card (you may have a different manufacturer). Download the updated driver from the HP Support site, and use the following steps to re-install the update:

1. First, download the latest driver. Then do the next steps.
2. Click Start Menu
3. Right Click My Computer/Computer
4. Click Manage
5. Click Device Manager from the list on the left
6. Find the device you are trying to uninstall by expanding the appropriate set of devices
7. Right click the device
8. Click Uninstall (do not click OK in the dialog box that pops up after hitting Uninstall)
9. Put a tick in Delete driver software for this device (if this option is available, otherwise just hit OK) and hit OK
10. Restart your computer only if Windows asks you to.
11. Install the latest driver for the device.

Alternatively:

1. Login as an adminstrative user.
2. First, download the latest driver. Then do the next steps.
3. Click Start Menu
4. Click Control Panel
5. Click Hardware and Sound
6. Click Device Manager (the last link under Devices and Printers)
7. Find the device you are trying to uninstall by expanding the appropriate set of devices
8. Right click the device
9. Click Uninstall (do not click OK in the dialog box that pops up after hitting Uninstall)
10. Put a tick in Delete driver software for this device (if this option is available, otherwise just hit OK) and hit OK
11. Restart your computer only if Windows asks you to.
12. Install the latest driver for the device.

Also, some of your crashes are indicating hard disk related problems. It may just be hard disk corruption, or maybe your hard disk was disconnected during transit.

The first thing to check is whether the hard disk is physically connected to the motherboard properly. To do so:

• Shut down and turn off the computer
• Remove the AC Adapter
• Remove the battery
• Hold down the power button for 15-30 seconds to close the circuit and drain any residual power
• Remove the panel on the underside of the laptop where the hard disk is housed
• Remove and re-insert the hard disk by sliding it away from the connector and then gently but firmly pressing it back into the connector (no screws should need to be removed to do this step)
• Replace the panel on the underside of the laptop to cover the hard disk
• Replace the battery
• Replace the AC Adapter
• Turn on the computer and see how it responds

Post back once these steps have been implemented whether the system is stable. Sometimes these crashes can occur due to a loose connection.


Then run Disk Check with Automatically fix file system errors checked.

Back again, notebook seems to work.

I did all what was suggested by writhziden (thank you very much), and because nothing really helped, I finally did this:

From another HP notebook I borrowed few things to make a swap - namely 4GB ram module (to replace old 2x2GB), and hdd with original HP W7 instalation. After few driver instalations, both machines work. No BSOD, crashes, hang ups... Strange.

I still think the main reason of errors were old 2x2GB ram modules, because they are not "the same" (adata and samsung) - but it is just a feeling. And they work in the other machine flawlessly

Anyway, thanks for help

Interesting... :)

Once you are confident the problem is solved, post back, and also mark the thread solved at that time. Best of luck!

After few days of normal use and testing everything looks fine. No more bsods or freezes. Problem solved.

That is great news! Nice work tracking it down and resolving it!!