Change Remove Button is Missing.

I got a problem when I trying to uninstall a program from Add/Remove program. I was unable to see the Change Remove Button . I followed the steps changed some registry value after which I was able to see the Change Remove Button. You can follow the steps which is mention here to resolve the issue.
First, to check whether the Add/Remove applet is alive and well, go to Start>Run, type in "appwiz.cpl" (without the quotes) and click OK (or press Enter).
If the Add/Remove applet starts, then it's a problem with the shortcuts. The easiest and most immediate way to fix it is to go to C:\Windows\System32 folder, find the appwiz.cpl file and put a shortcut to it somewhere handy.
If it doesn't start, you can try replacing it with a new copy through System File Checker. Rather than running the whole SFC routine, you can go to Start>Run, type in "msconfig" (without the quotes), click OK and on the General tab, click the "Expand File" button. Tell it you want to extract appwiz.cpl, tell it to extract it from either C:\I386 or your XP CD (which you'll need to put in the CD drive) and tell it to extract it to C:\Windows\System32.
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Click Start, Run and type REGEDIT. This starts the Registry Editor. Navigate to:
HKEY_LOCAL_MACHINE
\SOFTWARE
\Microsoft
\Windows
\CurrentVersion
\Uninstall
\
here is Adobe Acrobat 5.0 - Taken as an example
*
In the right-pane, do the following:
Double-click NoRemove (REG_DWORD) and set it to 0
Double-click NoModify (REG_DWORD) and set it to 0
If NoRemove is set to 1, the Remove button will be unavailable
If NoModify is set to 1, the Change button will be unavailable.
Hopefully it will work.

Note: Applicable for window vista/windows xp/2000