I need to restore it to factory settings. - eMachines W3611 PC Desktop

You can resort to iTunes to restore iPhone to factory settings. Just follow below steps to do that.

Restoring iPhone to Factory Settings with iTunes

iTunes enables users to back up data to iTunes and restore iPhone to factory settings. Before you start restoring iPhone to factory settings, please note that you need to install the latest version of iTunes on your PC or MAC. Then go to Settings > iCloud to turn off Find My iPhone. Now, the detailed restoring steps are as follows.
1. Plug iPhone into the computer with the USB cable. The iTunes on your computer will automatically launch. If not, double-click the icon to start it.
2. Click the name of your iPhone at the upper right corner of iTunes, and then the information of your iPhone will be shown. Click the "Restore iPhone" button in the window to start.
3. iTunes will ask whether you want to back up iPhone before restoring. You'd better choose "Yes" for the reset will erase the contents in your iPhone. Then iTunes will start restoring your iPhone to factory settings.

3. Click Restore again to confirm. Then iTunes erases your iPhone and installs the latest iOS or iPod software. After you restore your iPhone to factory settings, it will restart. Now you can set it up as new.

For more methods, check: How Do I Restore My iPhone to Factory Settings

iTunes enables you to restore iPad to factory settings. Before you start restoring iPad to factory settings, please note that you need to install the latest version of iTunes on your computer. Then go to Settings > iCloud to turn off Find My iPhone. Now, you can factory reset your iPad with iTunes as follows.

1. Plug iPad into the computer with the USB cable. The iTunes on your computer will automatically launch. If not, double-click the icon to start it.

2. Click the name of your iPad at the upper right corner of iTunes, and then the information of your iPad will be shown. Click the "Restore iPad" button in the window to start.

3. iTunes will ask whether you want to back up iPad before restoring. You'd better choose "Yes" for the reset will erase the contents in your iPad. Then iTunes will start restoring your iPad to factory settings.

4. Click Restore again to confirm. Then iTunes erases your iPad and installs the latest iOS software. After you restore tablet to factory settings, it will restart. Now you can set it up as new.

How to Restore iPhone 6 Plus to Factory Settings

If you tend to restore iPhone to factory settings, there are two methods for you.

Restoring iPhone to Factory Settings with iTunes

iTunes enables users to back up data to iTunes and restore iPhone to factory settings. Before you start restoring iPhone to factory settings, please note that you need to install the latest version of iTunes on your PC or MAC. Then go to Settings > iCloud to turn off Find My iPhone. Now, the detailed restoring steps are as follows.
1. Plug iPhone into the computer with the USB cable. The iTunes on your computer will automatically launch. If not, double-click the icon to start it.
2. Click the name of your iPhone at the upper right corner of iTunes, and then the information of your iPhone will be shown. Click the "Restore iPhone" button in the window to start.
3. iTunes will ask whether you want to back up iPhone before restoring. You'd better choose "Yes" for the reset will erase the contents in your iPhone. Then iTunes will start restoring your iPhone to factory settings.

3. Click Restore again to confirm. Then iTunes erases your iPhone and installs the latest iOS or iPod software. After you restore your iPhone to factory settings, it will restart. Now you can set it up as new.

If this solution won't work, follow this post. How Do I Restore My iPhone to Factory Settings

Depending on the brand and year it was made there may be a factory partition that will restore computer back to factory defaults, if not then a reinstallation of windows will be necessary, If factory partition is available just do a search o Google with your make and model # such as : How to restore an Acer Aspire 7425 to factory defaults using recovery partition

This WEB site shows how to do a factory restore.
http://www.tomshardware.com/forum/13678-63-restore-acer-aspire-factory-settings

Restoring the factory-set defaults
Restoring the factory-set defaults returns all of the settings to the factory defaults.
To restore the factory-set defaults
1 (LEFT ARROW) or the (RIGHT ARROW) button to select Service, and then press
Use the
(SELECT).
2 (LEFT ARROW) or the (RIGHT ARROW) button to select Restore defaults, and then
Use the
press (SELECT).
The device automatically restarts.

Then you need to change the default settings back to what they were.

Hi,

To restore to factory settings you no need any codes.

Please follow the below steps to restore your mobile to factory settings

Menu > Settings > Restore factory settings

When you select this,It will ask for security code.The default security code for nokia mobile is 12345.If you have changed the security code then type that code.

It takes several seconds to bring it to factory settings.

Thank You

You can restore to Factory Settings using BIOS
While booting the system you need to press F10 (or) F2 (or) F5
Its depends upon the bios model

Restore Factory Default Settings When you restore factory default settings to the base station, you clear your Internet connection settings and any special base station configurations that you have established. After the restore is complete, you will need to reconfigure your base station settings or restore these settings from a backup file. You should restore the original factory default settings only under the following circumstances: O You are experiencing serious problems with your base station, and resetting the base station does not fix the problem. O You cannot remember your base station password. In this situation, you must restore the factory default settings by using the Restore button on the base station, and then use the default password admin to log on to the Base Station Management Tool. To restore factory default settings 1. Open the Base Station Management Tool, and then click Management. 2. On the Management menu, click Back Up and Restore Settings. 3. Under Restore factory default settings, click Restore Factory Default Settings. While the original factory default settings are being restored to the base station, the Power light on the base station turns orange. When the light is solid green, the settings have been restored. If you want to open the Base Station Management Tool after the settings have been restored, type admin as the password on the Logon page. Do not attempt to log on to the base station until the settings are restored and the Power light on the base station is solid green. After you restore the factory default settings to the base station, you should navigate to each page of the Base Station Management Tool and reestablish the network settings you want, or restore the base station settings by using a backup file. For information about creating a backup file of your settings, see the following section. Be sure to establish your unique base station password as soon as possible after restoring the factory default settings to prevent unauthorized users from logging on. For more information, see “Change the Base Station Password.” please rate this answer, thanks

contact acer you can get there number from the website and they will let you purchase a restore disc for 15bucks