Monday, May 15, 2017

Install and recovery apple lap os

About macOS Recovery

The utilities in macOS Recovery help you restore from Time Machine, reinstall macOS, get help online, repair or erase a hard disk, and more.
macOS Recovery is part of the built-in recovery system of your Mac. You can start up from macOS Recovery and use its utilities to recover from certain software issues or take other actions on your Mac.

How to use macOS Recovery

Hold down Command-R or one of the other macOS Recovery key combinations on your keyboard immediately after pressing the power button to turn on your Mac, or immediately after your Mac begins to restart. Continue holding until you see the Apple logo or a spinning globe. Startup is complete when you see the utilities window:
macOS Utilities window
After starting up from macOS Recovery, select from these utilities, then click Continue:
Restore From Time Machine Backup: Restore your Mac from an external hard drive or Time Capsule that contains a Time Machine backup of your Mac.
Reinstall macOS (or Reinstall OS X): Download and reinstall the Mac operating system.
The Reinstall macOS utility installs different versions of macOS depending on the key combination you used while starting up. For details, see How to reinstall macOS.
Get Help Online: Use Safari to browse the web and find help for your Mac. Links to Apple's support website are included. Browser plug-ins and extensions are disabled.
Disk Utility: Use Disk Utility to repair or erase your startup disk or other hard disk.
These additional utilities are available from the Utilities menu in the menu bar:
To quit macOS Recovery, choose Restart or Shut Down from the Apple () menu. If you want to choose a different startup disk before quitting, choose Startup Disk from the Apple menu.

If you can't start up from macOS Recovery

Newer Mac computers and some older Mac computers automatically try to start up from macOS Recovery over the Internet when unable to start up from the built-in recovery system. When that happens, you see a spinning globe instead of an Apple logo during startup. To manually start up from macOS Recovery over the Internet, hold down Option-Command-R or Shift-Option-Command-R at startup.
If you still can't start up from macOS Recovery, and you have a Mac that is able to start up completely, you might be able to create an external Mac startup disk to start up from instead.
macOS Recovery over the Internet, the Reinstall macOS utility, and the Get Help Online utility all require an Internet connection. If you need to connect to a Wi-Fi network, move your pointer to the top of the screen, then choose a network from the Wi-Fi status menu 

power on and press  Command +R for recovery menu.
Select recovery from time machine backup

Mac Start up scheme
ALT + Option

Shift key Safe boot

Command + Option +R
Wifi  menu
Download the software and install

Thursday, April 13, 2017

Unable to refresh or reset PC after Automatic Repair fails in Windows 8


Consider the following scenario:
  • You have Windows 8 or Windows 8 Pro installed on your PC.
  • Your PC fails to boot into Windows and launches Automatic Repair to attempt to repair Windows.
  • Automatic Repair is unable to repair your PC and you select "Advanced options".
  • After selecting "Troubleshoot", you choose to either "Refresh your PC" or "Reset your PC".

In this scenario, recovery may fail and you are returned back to the main WinRE screen.


This issue may occur if the System or Software registry hives have become damaged or corrupted.


To attempt to resolve this issue, follow the steps below.

NOTE: Following these steps should only be used if you are attempting to use the "Refresh your PC" or "Reset your PC" options in Windows RE because your system is in a non-bootable state.
  1. After Automatic Repair fails to repair your PC, select "Advanced options" and then "Troubleshoot".
  2. Select "Advanced options" and then select "Command Prompt".
  3. If prompted, enter in the password for the user name.
  4. At the Command Prompt, go to the \windows\system32\config folder by typing the following command: cd %windir%\system32\config.
  5. Rename the System and Software registry hives to System.001 and Software.001 by using the following commands:
    ren system system.001
    ren software software.001

    NOTE: Renaming the Software hive will not allow you to use the "Refresh your PC" option. If you want to use the "Refresh your PC" option, only rename the System hive. If the Software hive is also corrupt, you may not be able to use the "Refresh your PC" option.
  6. Type "exit" without the quotes to exit the Command Prompt and reboot the PC back to the Automatic Repair screen.
  7. After selecting "Advanced options" and then "Troubleshoot", select either "Refresh your PC" or "Reset your PC".

More Information

Using the "Reset your PC" option will remove all of the files on your hard drive and resets your PC back to the version of Windows 8 that was preinstalled by the OEM on your PC. All new applications that were installed on your PC after you purchased it will need to be reinstalled.

How find compatible electronic Parts

We have big problem about compatible electronic parts for repair electronic circuits. therefore we need to know or follow the data sheet or book for compatible part if there no named part .

These are few web site for find component easily .

M3004D mosfet

Here is the listing from daily list of import records released by government of India for the keyword `M3004d mosfet` imported from China .

As per our records it was last imported on 09 Nov 2016 at under HS code 85412900 with quantity 6150 as TRANSISTOR PART NO. 192802 STD3NK50Z-1 TRANS MOSFET N-CH 500V 2.3A from CHINA at the price of Rs.10.36

The items with the keyword `M3004d mosfet` is commonly imported under the name like TRANSISTOR PART NO.10106072 ST MOSFET 800V 0.95 OHM, TRANSISTOR PART NO. 192802 STD3NK50Z-1 TRANS MOSFET N-CH 500V 2.3A, 781-SIR426DP-GE3 LQF-MSIR426D-S17 SIR426DP-T1-GE3 - VISHAY MOSFET.

The average import price of items with keyword `M3004d mosfet` is Indian Rupees 444. 

Friday, December 9, 2016

Another way to download apps for kindel fire

The popular way to downloading apps for kindle fire by apps store. but you can download apps from

Aldo another links are

Saturday, October 22, 2016

Reduce Activity of Hard drive your pc or laptop

Speed up your pc with reduce hard drive usage.
Time to time slowing your pc when you using windows 7 ,8 ,8,1 ,or 10.There may be  several reasons cause for slow down the pc or laptop.
1, CPU Usage
2. RAM Usage
3. Storage usage

You can find what happening ,Which part accessing 100% by view Task Manager.

Press [Ctrl]+[Alt]+[Del] to bring up the Windows Security screen, which provides users with five options including Windows Task Manager

Just click Start Task Manager. Right-click the task bar and you'll see the context menu. Then, just choose the Start Task Manager command.

 Before checking viruses or after checking drive partition errors by chkdsk utility. There are 3 methods to reduce the hard drive usage.

1. Disable the Windows 10, 8, or 7 Superfetch

Enable or disable the Windows 10, 8, or 7 Superfetch (otherwise known as Prefetch) feature. Superfetch caches data so that it can be immediately available to your application. Sometimes this can affect the performance of certain applications. It tends to not work well with gaming, but can improve performance with business apps.
To modify whether Superfetch is enabled or disabled, you can perform the following steps.

Disable from Services

  1. Hold the Windows Key, while pressing “R” to bring up the Run dialog box.
  2. Type “services.msc“, then press “Enter“.
  3. The Services window displays. Find “Superfetch” in the list.
  4. Right-click “Superfetch“, then select “Properties“.
  5. Select the “Stop” button if you wish to stop the service. In the “Startup type” dropdown menu, choose “Disabled“.

Enable or Disable from Registry

  1. Hold the Windows Key, while pressing “R” to bring up the Run dialog box.
  2. Type “Regedit“, then press “Enter“.
  3. The Registry Editor window appears. Navigate to the following location in the Registry.
    • SYSTEM
    • CurrentControlSet
    • Control
    • Session Manager
    • MemoryManagement
    • PrefetchParameters
  4. On the right side, double-click on “EnableSuperfetch“. If this value doesn’t exist, right-click the “PrefetchParameters” folder, then choose “New” > “DWORD Value“.
  5. Give “PrefetchParameters” one of the following values:
    • 0 – to disable Superfetch
    • 1 – to enable prefetching when program is launched
    • 2 – to enable boot prefetching
    • 3 – to enable prefectching of everything
  6. Select “OK“.
  7. Close the Registry Editor.
Note: If you disable Superfetch and would like to enable it for certain applications, you can use special switch in the program shortcut: /prefetch:1

2. Dissable by net service

Using NET to stop a Windows Service

To stop a service, run:
net stop <Service-Name>
c:\>net stop "windows Search"

Starting a Windows Service with NET

To start an idle Windows Service, run:
net start <Service-Name>
c:\>net start "windows Search"

To stop this, and prevent it from happening during your current session (until Windows is rebooted) open the Command Prompt (the quickest way is by right-clicking the Start button and selecting Command Prompt (Admin)) and enter the following:

c:\>net stop  "windows Search"

c:\>net stop superfetch

3. Stop BITS (Background Intelligent Transfer Service)
This method shows you how to Start/Stop Background Intelligent Transfer from Services.msc
Please perform the following steps:

1. Select Start and select run
2. Type services.msc
3. find Background Intelligent Transfer Service

From General tab you can Start/Stop and change the Startup type of Background Intelligent Transfer
To finish press ok button and close Services window


 Those changes affecting to reduce the usage of hard d rive therefore remain the bandwidth for data transferring . Also reduce the wear of the drive access arm and reduce drive faults.

Monday, August 22, 2016

How can find the where is short and how to fix it.
 Remove the PR102. no ac adapter light off. but I can't understand where is the problem, section may be B+ or in PU100.?

Can we fix dell 3521 mother board short cuircuit repair?

How can find the where is short and how to fix it.
 Remove the PR102. no ac adapter light off. but I can't understand where is the problem, section may be B+ or in PU100.?