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Should I remove A4S Scanner?

What percent of users and experts removed it?
9% remove it91% keep it
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1.02.0003 100.00%

A4S Scanner


A4S Scanner is a software program developed by Penpower Co ltd. The setup package generally installs about 4 files and is usually about 2.54 MB (2,658,304 bytes). Relative to the overall usage of those who have this installed, most are running it on Windows 7 (SP1). While about 82% of users of A4S Scanner come from the United States, it is also popular in Thailand and TT.

Program detailsProgram details

Installation folder: C:\Program Files\penpower\worldocscan400
Uninstaller: MsiExec.exe /X{5ED5B784-AED3-474E-8CD6-ABE3E60793FD}
(The Windows Installer is used for the installation, maintenance, and removal.)
Estimated size: 2.54 MB
Language: English (United States)

Program filesFiles installed by A4S Scanner

  • wlds400w.dll (by Document Capture Technologies) - DCT Dynamic Link Library (DCT WIA DLL)
  • wlds400.dll (by Document Capture Technologies) - Scanner library
  • wlds400-32.dll
  • wlds400u.dll - Scanner UI DLL

How do I remove A4S Scanner?

Quickly and completely remove A4S Scanner from your computer by downloading "Should I Remove It?", its 100% FREE and installs in seconds (click the button below).
Or, you can uninstall A4S Scanner from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program A4S Scanner, click it, and then do one of the following:
    • Windows Vista/7/8: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove A4S Scanner.

Uninstall it 9%
Keep it 91%
Windows 7 (SP1)
United States

Distribution by countryGeography

81.82% of installs come from the United States
Which countries install it?
  United States 81.82%
  Thailand 9.09%
  TT 9.09%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Acer 40.00%
Toshiba 20.00%
Lenovo 20.00%
Common models
TOSHIBA Satellite L670 20.00%
LENOVO 2537CTO 20.00%
Gigabyte G31M-ES2C 20.00%
Gateway NV56 Series ... 20.00%
Acer Aspire 5532 20.00%


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