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Download PC Tools' Alternate Operating System Scanner

Alternate Operating System Scan is a Live CD for scanning a Windows® system without having to be running Windows®.

With the advancement of malware technology in recent years, and the ability of malware to hide within a running Windows® system, it was determined that a solution would be required such that a Windows® system could be scanned (and cleaned) without the need for the Windows® operating system to be running.

The Alternate Operating System Scan is an attempt to be the solution to the above problem. It is a live CD that will detect, scan, and clean malware files and associated Windows® registry keys from an infected Windows® system.

The Alternate Operating System Scan is designed to be a last resort, used to get Windows® back into a state in which Spyware Doctor for Windows® can do its job. Therefore, it only scans files and registry keys that are defined in the refdb database. It does not remove directories.

Please note that AOSS is not a supported product. The PC Tools forum for AOSS includes many tips and we encourage you to use this forum to report on successes, problems or issues encountered with AOSS.

If a valid license is not found, you may still clean your system once with AOSS.

Download Alternate Operating System Scanner

Current Version:1.0.0.135
File Size:8,263 KB
Operating System:Designed For Windows® XP (32bit)
Supported File Systems:FAT 16/32, NTFS up to 5.1
Release Date:January 4, 2007

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Creating and using the Live AOSS CD

Creating the Live AOSS CD

  1. Download the AOSS.iso file.
  2. Burn the AOSS.iso file to a blank CD using CD burning software that is capable of burning ISO image files to blank CDs.

    Note: If required, ensure that you use the CD burning software's 'image burning' function. This is required to create a functional and bootable Live AOSS CD. Burning the AOSS.iso file itself directly to a blank CD will fail to produce a functional and bootable CD.

Using the Live AOSS CD

  1. Insert the Live AOSS CD into your computer's CD drive and reboot your computer.

    Note: Ensure that your computer's BIOS is configured to boot from your CD drive first, or before other drives such as the hard disk containing your Windows® operating system or other devices with bootable content. Consult your PC manufacturer's instructions if required.

  2. After the CD boots, the AOSS EULA displays. To continue using the Live AOSS CD, you must accept the EULA.

    Click the I Accept the Agreement button to accept the EULA and continue. If you do not agree with the EULA, click Cancel to exit the Live AOSS CD session.

  3. Select Partitions – select the drives you wish to scan from the list of available drives or partitions.

    Note: AOSS follows standard Windows® drive mapping conventions only. If you have changed your drive mapping in Windows®, these changes will NOT be reflected here.

    Click the Next button to continue or click Close to exit the Live AOSS CD session.

  4. Confirm Partitions – verify that the drives or partitions indicated are the ones you want scanned and click the Next button to continue. Otherwise, click the Prev button to go back a step.
  5. Database Update – if available, plug your USB drive containing the most recent refdb.dat file (created using the procedure below) into your computer and wait for AOSS to detect this file on the USB drive.

    If you wish to skip this step, click the Skip button and AOSS will commence scanning using the refdb.dat file included on the Live AOSS CD. Click the Prev button to go back a step.

  6. Scanning Partitions – AOSS commences scanning the selected partitions. AOSS scanning consists of three stages:
    1. All regular files on the system are scanned. Regular files are those which are viewable through Windows® Explorer.
    2. Alternate Data Streams (ADSs) are scanned. These are files that may be 'hidden' from Windows® Explorer but may be attached to regular files.
    3. System Registry and backup files are scanned.

    Note: Wait for the scan to complete. This process may require several minutes to complete.

    Click the Cancel Scan button to cancel the AOSS scanning process.

  7. If AOSS detects any infected files or Windows® Registry keys, a list of these is displayed. If a valid Spyware Doctor License has been found on your computer, you can then proceed to clean the Windows® operating system. AOSS then removes files and Windows® Registry keys resulting from malware infections. If a file cannot be removed by AOSS, it is overwritten with information about the type of malware identified within it and the filename extension is changed to '.sdf' (Spyware Doctor File).

Note: It is strongly recommended that you run Spyware Doctor in Windows® after running AOSS to remove any malware items that may potentially remain on your system.

Copying the most recent Spyware Doctor database to a USB drive for use with the Live AOSS CD

  1. In Windows®, open Spyware Doctor and run Smart Update to ensure you have the latest Spyware Doctor database file (refdb.dat).
  2. Plug a USB drive into your computer and wait for it to be completely detected by Windows®, for example, when the drive appears in Windows® Explorer.
  3. Copy the refdb.dat file (usually located in the C:\Program Files\Spyware Doctor directory) to your USB drive. The refdb.dat file must be copied to the root directory of the first partition of the USB drive.
  4. Safely remove the USB drive.

Source Code

Download the source code to the Open Source components used in the AOSS CD here [47532 kB].

 
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