How To Fix "Network Controller is not found" on HP Pavilion dv7t

various problems on a laptop it makes us a little dizzy, especially when we need these features but suddenly there are unexpected things that resulted in one of the features on the laptop is not functioning normally, as in the case of HP Pavilion dv7t Entertainment Notebook PC-4000, sometimes you will find erorr when installing LAN driver that uses the type lan like Realtek, Broadcom, and others, erorr listed as below,

to improve these erorr, you must disable the power saving BIOS before installing the LAN drivers on the HP laptop you by following the steps as follows

• Click Start, and then click Shut Down.
• Select Restart, and then click OK.
• When the first screen appears, press the F10 key to enter the BIOS Setup.
• Use the arrow keys to scroll over to the System Configuration.
• Scroll to the LAN Power Saving, press the Enter key to Disabled.
• To exit the BIOS setup, press the F10 key, select Yes, and then press Enter.

after that try to re-install LAN driver on your HP laptop, and your LAN will function normally again.

Maintain Healthy Laptop Hardrive

clean hardrive on a laptop by first cleaning the shortcut on the desktop that are not useful on your laptop, because if you do not clean then the shortcut will burden the laptop at boot time, try to remove unnecessary files or multiple files, if you are not using a software specific in your laptop, it helps you remove the software on the control panel, 

delete the cache is the right step to make your hardrive clean, cache on an operating system is usually in because of the use of any software, for example that many results in the file cache is an Internet browser, you can delete the cache in your Internet browser  in accordance with the type of browser you use, 

perform disk cleanup is also a good way to make your laptop hard drive remain durable and clean, you can retrace the steps below to perform clean up on your har drive, 

• Click Start, and point to Programs. 
• Point to Accessories and then to System Tools. 
• Click Disk Cleanup. 
• Choose the drive you Want To scan from the drop-down menu, and click OK. 
• Wait while Disk Cleanup calculates how much space is available for cleanup. This step-May take a Few Minutes. 
• Click the "Disk Cleanup" tab and then the checkbox (es) next to the type (s) of files You Want to delete. 
• Click OK to start the cleanup process. Depending on the amount of files You Want to delete, this May take installments minutes. 

last you can do to defragment your hardrive, using the features contained in the operating system that andagunakan or using third-party applications, but if you use third-party applications you must be careful in its use.

System hang, blue screen or unexpected restart On Lenovo Thinkpad Laptop

Lenovo ThinkPad laptop has a problem on Intel Matrix Storage Manager driver, some consequences caused by the driver is. System Hang with an Error Message, Blue Screen, Windows May stop responding with an error message, The system auto restart May just after an error message, but all that can be overcome by installing the Intel Matrix Storage drivers latest drivers, such problems have on Lenovo ThinkPad SL series laptops series, ThinkPad X Series, ThinkPad T series, ThinkPad  R series, ThinkCentre M58, M58p, to resolve the issue please download the latest driver Intel Matrix Storage Manager in accordance with the operating system you use 

For ThinkPad T / X / R Series running Windows 7, Vista or XP 32-bit
For ThinkPad SL Series running Windows Vista 32-bit,
For ThinkPad SL series is running Windows XP 32-bit,
For ThinkCentre M58, M58p running Windows Vista or XP 32-bit

(download link is below)
After you download the files above please follow the steps below to install it to your  lenovo  laptop,

• Click Start. [Windows 7/Vista] 
• Right-click Computer, and then click Properties. At the left pane, click Device Manager. [Windows XP] 
• Right-click My Computer, click Properties, click the Hardware tab, and then click Device Manager.
• Double-click the IDE ATA / ATAPI controllers or storage controllers category. 
• Double-click Either of the Following devices. 

Intel (R) SATA AHCI Controller 82801HEM/HBM
Intel (R) 82801GBM SATA AHCI Controller
Intel (R) ICH9M-E / M SATA AHCI Controller
Intel (R) SATA RAID Controller ICH8M-E/ICH9M-E/M
Standard AHCI 1.0 Serial ATA Controller
Intel (R) ICH9M/ME Family 4 Port SATA AHCI Controller - 2929
RAID Controller.

• Click the Driver tab, then click Update Driver Software ... 
• Click Browse my computer for driver software. 
• Click Browse ..., then point to driver location specified in Step 9. 
• Make sure the checkbox next to "Include subfolders" is checked and click 

Download

Reinstall the Operating System On Acer Laptop

some cases that cause the operating system on your laptop crashes atupun damaged by virus or is not accidentally deleted, and cause your laptop must be installed back to the operating system that is still fresh, to do this please follow the steps below, make sure all important data backed up first, 

1. Restart the computer. 
2. When the Acer logo appears on the screen, press the Alt and F10 keys repeatedly. 
3. If you are prompted with a Microsoft Windows boot screen, press the Enter key. 
4. After the system recovery application has loaded, follow the prompts to reinstall the Operating System. If the ability to reinstall from the previous method is not available or fails, recovery of the Operating System will from need to be from the Recovery Media. 

Note: If your computer does not have an internal optical disc drive, an external optical disc drive will from be required in order to recover the operating system using the Acer Recovery Media.

1. Restart the computer. 
2. When the Acer logo appears on the screen, press the F12 key repeatedly to enter the computer's Boot Menu. 
3. Press the CD-ROM drive eject button and insert the disc labeled CD System. 
4. Close the CD-ROM tray. 
5. Refer to on screen instructions to select Either CDROM or USB CDROM. 
6. The computer will of the boot from the Acer Recovery Media 
7. When prompted for the Recovery CD, remove the System CD and insert the Recovery CD. 

Note: If there are multiple Recovery CDs, please insert the first of the Recovery CDs.
After the system recovery application has loaded, follow the prompts to reinstall the Operating System