Here is this:
Some applications in Add/Remove Programs list are missing Change and Remove buttons ?
When you open Add/Remove Programs applet and click an application entry, you may notice that the Change, Remove (or Change/Remove) buttons may be missing, thus leaving only the application name entry there (Fig 1). Here is a method to make Windows show the Remove, Change (or the Change/Remove button together) buttons in the listing. (Fig 3)
Click Start, Run and type REGEDIT. This starts the Registry Editor. Navigate to:
<Program Name> 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
or try this and apply it to the program that is missing
In Windows XP SP2, Windows Media Player 10 entry appears under the Windows XP - Software Updates section. You need to put a checkmark near the Show Updates box at the top. (Related info: Add/Remove Programs filtering in XP SP2)
If the Windows Media Player 10 entry has been removed accidentally from the registry, use this procedure to reinstate the entry.
Open Regedit.exe and navigate to:
HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Uninstall
Create a sub-key named Windows Media Player
In the right-pane, create the following REG_SZ values:
Assign the following data for each value:
DisplayIcon C:\Program Files\Windows Media Player\wmplayer.exe
DisplayName Windows Media Player 10
ParentDisplayName Windows Updates
UninstallString "C:\Program Files\Windows Media Player\Setup_wm.exe" /Uninstall
Automate the above with this REG file. Download the file and save to Desktop. Right-click the file and choose Merge.