class data sharing should be called on winNT families only

Progress bar doesn't shutdown after update is completed on Win98

Tested_Java_Release : 1.5.0-beta2 Build 51
Tested_Build : jre-1_5_0-beta2-windows-i586.exe
Tested_Build_Location : /net/koori.sfbay/p/jdk10/jdk/1.5.0/beta2/b51/bundles/windows-i586
Test_Location : Java Update Tests (see steps to reproduce)
Tested_Machine_Name : rishi1, mandalay
Testted O/S : Windows 98 SE
Tested_ Browsers : IE


Steps to Reproduce :
 --------------------
1. Install jre-1_5_0-beta2-windows-i586.exe from the above mentioned location
2 Add an entry in the registry in the SOFTWARE/Javasoft/javaupdate/Policy "UpdateServletURL http://java.sun.com/webapps/update/1.5.0/map.xml"
3 On Test Machine, Java Control Panel -> "Update" tab -> click on "Update Now"
     button.
4 Ballon Tool Tip shows "New updates are ready to download" in taskbar.
5 Click on Java update Icon in taskbar to download .
6 Ballon Tool Tip shows "New updates are ready to install" after download is completed.
7 Click on Java update Icon in taskbar to install a new updates (1.5.0_01)
8 Progress bar doesn't shutdown

However the new updates is installed:
 
1. Check the java version at the command prompt and it shows:
    java version "1.5.0_01-beta2"
    Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_01-beta2-b51)
    Java HotSpot(TM) Client VM (build 1.5.0_01-beta2-b51, mixed mode)
 
2. Check java version in Java Control Panel (General --> About)
    Version 1.5.0 (build 1.5.0_01-beta2-b51) is displayed
 
 


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