Download the kernel update from here.

If you’re running on a user you should try to install like default installation.

Fix Nexus One problem

Step 1: First run a userdebug or eng build. This update won’t run on the user build, you will get verification failed;
Step 2: Download the update from here;
Step 3: Now you should copy the file to phone SD cars, but first rename the file into update.zip;
Step 4: In case that you have adb, try adb reboot recovery(more details for abd here);
Step 5: If you don’t have adb try the next steps:

• Power off your phone
• Turn it on whilst holding the trackball down
• At the boot screen, use the volume keys to select bootloader then press the power button to select
• At the next screen, select recovery and press the power button to select it
  

Step 6: The boot cross will appear, and shortly after a ‘!’ graphic will appear. Hold down the power button, then press volume up;
Step 7: You will see a menu with blue text. Use the trackball to highlight and select apply SD card update;
Step 8: The process should take a few seconds, after which you can reboot your phone;
Step 9: If you get verification failed you probably have a user build;
Step 10: You now have a tether-enabled kernel.

Next you can read the instructions for user build: All steps before step 12 are safe and wont touch your phone’s Rom /flash

Step 1: Get a copy of adb and fastboot (check the SDK or Google for them);
Step 2: Grab the Nexus One update zip and nexusone-zimage from the downloads page;
Step 3: Plug your phone’s USB in;
Step 4: adb reboot bootloader;
Step 5: When the bootloader screen appears: fastboot boot nexusone-zimage;
Step 6: Make sure the phone boots, if not, STOP

• Note that Wifi will not work at this stage.
• If the phone fails to boot, something is wrong. Pull the battery to reboot.

Step 7: Unzip the update zipfile, then adb push bcm4329.ko /sqlite_stmt_journals/;
Step 8: adb shell;
Step 9: su;
Step 10: insmod /sqlite_stmt_journals/bcm4329.ko;

• If an error appears doing this, STOP;

Step 11:  lsmod;

• You should see ‘bcm4329′ listed. If not, STOP;

Step 12: mount -w -o remount /dev/block/mtdblock3 /system;
Step 13: cat /sqlite_stmt_journals/bcm4329.ko > /system/lib/modules/bcm4329.ko;
Step 14: Logout out of the phone;
Step 15: adb reboot bootloader;
Step 16: When the boot screen appears: fastboot flash zimage nexusone-zimage;
Step 17: fastboot reboot;
Step 18. Your Nexus One should come up;

source

Among the many errors that occur in Windows and which can be solved here, at least a part of them, this error occurred which cannot be neglected.

Most times the BSOD(Black Screen of Death) in Windows 7 appear when you logging on, and it seems that this error occurs after the latest Microsoft security updates released on November 25th, have caused problems for some Windows 7 users creating a BSOD(Black Screen of Death).

To solve the Black Screen Of Death(BSOD) in Windows 7 you can follow the next steps to fix the BSOD screen, but these are available in case that the BSOD not appear everytime.

If appear the BSOD(Black Screen of Death) screen in Windows 7, follow these steps to fix this error:

Step 1: Restart your computer;

Step 2: Logon into your account, or into account that appear this BSOD;

Step 3: After the BSOD screen appear, make sure that your computer is connected to the Internet;

Step 4: Press the CTRL, ALT and DEL keys simultaneously;

Step 5: When prompted, click Start Task Manager;

Step 6: In Task Manager click on the Application Tab;

Step 7: Next click New Task;

Step 8:Now enter the command: “C:\Program Files\Internet Explorer\iexplore.exe”
“http://info.prevx.com/download.asp?GRAB=BLACKSCREENFIX”

Note: this command assumes that you are using internet explorer as your browser, if not substitute your browser path and file details for those of iexplore.exe or use the Browser option of Task manager to locate it;

Step 9: Click OK and your browser should start up and begin the download process;

Step 10: When prompted for the download click Run, the black screen fix program will download and run to automatically fix the issue;

Step 11: Restart your computer;

In case that appear the BSOD(Blue screen of death), this error may occur from different causes, causes like a new installation of software, new driver, an upgrade of a driver, compatible problem between the components, and these are not too all.

A solution to solve this error is to start your computer in Safe Mode, and then to restore your computer to an earlier date. Next you can read the steps to restore your computer to an earlier date.

How to restore your computer to an earlier date in Windows 7

Step 1: Go to Start, and type restore in the Search form;

Step 2: Click on System Restore at the top of the start menu;

Step 3: At this step should appear a Restore system files and settings screen;

Step 4: Select Recommended restore and then click Next button, or you can select Choose a different restore point and will see a list with restore points that you can choose from;

Info: For example if you make an antivirus installation last time and after that the BSOD occurs, choose the restored point old that the last installation of software.