User`s guide

To select/unselect a component

 Expand the System Components item in the System Clean-up tree and make sure that the

component you wish to clean up is selected. If you do not want to clean up a component, simply

clear its check box.

 If required, you can dig deeper by expanding a component and selecting/unselecting its contents.

Having specified the components for clean-up, click the Clean-up button to continue.

Windows Vista and Windows 7 do not keep information on file and computer searches. Furthermore,

information on opened/saved files is stored in the registry differently, so the wizard shows this information in a

different way.

7.3.2.5 Clean-up progress

The operation status window reports about the state of the current operation.

The progress bar indicates the level of completion of the selected operation.

In some cases, the operation may take a long time to be completed. If this is the case, select the

Shutdown the computer after completion check box. When the operation finishes, Acronis True

Image Home 2011 Netbook Edition will turn the computer off.

7.3.3 Hard Disk Wiping methods

Information removed from a hard disk drive by non-secure means (for example, by simple Windows

delete) can easily be recovered. Utilizing specialized equipment, it is possible to recover even

repeatedly overwritten information. Therefore, guaranteed data wiping is more important now than

ever before.

The guaranteed wiping of information from magnetic media (e.g. a hard disk drive) means it is

impossible to recover data by even a qualified specialist with the help of all known tools and recovery

methods.

This problem can be explained in the following way: Data is stored on a hard disk as a binary

sequence of 1 and 0 (ones and zeros), represented by differently magnetized parts of a disk.

Generally speaking, a 1 written to a hard disk is read as 1 by its controller, and 0 is read as 0.

However, if you write 1 over 0, the result is conditionally 0.95 and vice versa – if 1 is written over 1

the result is 1.05. These differences are irrelevant for the controller. However, using special

equipment, one can easily read the «underlying» sequence of 1's and 0's.

It only requires specialized software and inexpensive hardware to read data "deleted" this way by

analyzing magnetization of hard disk sectors, residual magnetization of track sides and/or by using

current magnetic microscopes.

Writing to magnetic media leads to subtle effects summarized as follows: every track of a disk stores

an image of every record ever written to it, but the effect of such records (magnetic layer) becomes

more subtle as time passes.