82,399,351 programs installed

Should I remove Stock Investor Professional?

What percent of users and experts removed it?
2% remove it98% keep it
Overall Sentiment
Very good
What do people think about it?
Be the first to rate (click star to rate)
How common is it?
Global Rank #35,293
United States Rank #18,192
Reach 0.0036%


4.0 92.16%
3.5 7.84%

Stock Investor Professional


Stock Investor Professional is a program developed by AAII. The most used version is 4.0, with over 98% of all installations currently using this version. A scheduled task is added to Windows Task Scheduler in order to launch the program at various scheduled times (the schedule varies depending on the version). The main program executable is si.exe. The software installer includes 34 files and is usually about 345.04 MB (361,796,993 bytes). In comparison to the total number of users, most PCs are running the OS Windows 7 (SP1) as well as Windows 8. While about 99% of users of Stock Investor Professional come from the United States, it is also popular in Canada.

Program detailsProgram details

URL: www.aaii.com
Installation folder: C:\Program Files\Stock Investor\Professional
Uninstaller: "C:\Program Files\InstallShield Installation Information\{6BA8FF81-C7E9-11D1-B885-444553540000}\setup.exe" -runfromtemp -l0x0409 -uninst -removeonly
Estimated size: 345.04 MB
Language: English (United States)

Program filesFiles installed by Stock Investor Professional

Program executable:si.exe
Name:AAII Stock Investor
Visual FoxPro 9.0 executable file
Path:C:\Program Files\stock investor\professional\si.exe
Additional files:
  • ChilkatDotNet2.dll (by Chilkat Software) - Chilkat .NET Class Library, V2.0 / 3.5 .NET Framework (Chilkat .NET 2.0 / 3.5 Framework Assembly)
  • si_util.exe (by American Association of Individual Investors) - Stock Investor Utilities (Visual FoxPro 9.0 executable)
  • si_start.exe (by American Association of Individual Investors) - si_start
  • SiServiceAltProxy.dll
  • SiServiceProdProxy.dll

Program behaviorsBehaviors exhibited

Scheduled Task
  • si_start.exe is scheduled as a task with the class '{E8C427F6-DEAE-4811-8726-CE1BE0191B5B}' (runs on registration).

How do I remove Stock Investor Professional?

Quickly and completely remove Stock Investor Professional from your computer by downloading "Should I Remove It?", its 100% FREE and installs in seconds (click the button below).
Or, you can uninstall Stock Investor Professional 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 Stock Investor Professional, 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 Stock Investor Professional.

Win 7 (SP1) 65%
Win Vista (SP2) 6%
Uninstall it 2%
Keep it 98%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 7 64.71%
Windows 8 29.41%
Windows Vista 5.88%
Which OS releases does it run on?
Windows 7 Professional 27.45%
Windows 7 Home Premium 27.45%
Windows 8.1 11.76%
Windows 7 Ultimate 9.80%
Windows 8.1 Pro 5.88%
Windows 10 Home 5.88%

Distribution by countryGeography

98.85% of installs come from the United States
Which countries install it?
  United States 98.85%
  Canada 1.15%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Hewlett-Packard 31.58%
Dell 26.32%
Lenovo 13.16%
Toshiba 5.26%
ASUS 5.26%
Gateway 5.26%
Acer 5.26%
Sony 2.63%
Samsung 2.63%
Common models
ASUS All Series 6.25%
Hewlett-Packard h8-1534 4.17%
TOSHIBA Satellite C655 2.08%
TOSHIBA Satellite C55D-A 2.08%
Acer Veriton M430 2.08%
Acer Aspire 4743 2.08%


user comment
No one has commented yet. Help others learn more about this software, share your comments.