Programs not showing up in Add Remove after Win xp upgrade

Upgraded a machine from win 98 to win xp. After the upgrade it appears that not all the programs are loading up in the add/remove programs. Is there a way to fix this?
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Can you see those applications in registry??

To check that goto start - run - regedit
and look at the subkeys of that particular program
zephyr_hex (Megan)DeveloperCommented:
some programs do not survive the upgrade.
see the section on Homework before you Install, point #3
"Make sure your software is compatible with XP. This is particularly important for CD-writer software, firewalls, and antivirus applications." ....
james1976Author Commented:
thank you for the responses ... I went to the registry put in the path but there was not ...\uninstall ... on the second response again thanks but the upgrade is after the fact, so if there is no other solution then what you suggest that "some programs do not survive the upgrade" may be correct ... However, I really don't think it is working correctly since after the upgrade we installed MS office 2003 and it, as an example does not show up... I would be happy to try other suggestions.
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>>I went to the registry put in the path but there was not ...\uninstall ...

are you saying that you didn't find uninstall key in registry in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion­\Uninstall ??

If so then this what might be the one to cause the problem.
james1976Author Commented:
yes, that's correct ... Uninstall was not there
the fact that you don't have the uinstall registry entry is the cause of your problem. The list in the add/remove programs is build on that entry key.
I don't have a specific solution for this but a good shot coulb be repairing the windows installation.
A Repair Install will replace the system files with the files on the XP CD used for the Repair Install. It will leave your applications and settings intact, but Windows updates will need to be reapplied.

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This is a KB article that gives about the missing programs in add/remove programs

But this article assumes that you have uninstall key in registry. I don't know how that can be added. May be as Mr Aruba says you can try repairing OS.
james1976Author Commented:
Under the current circumstances looks like the re-install will have to do. Thank you for the responses!
Just had the same problem, but polices were enabled.  Go to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies.  If there is an "Uninstall" Key, export it (to back it up first), then delete it.  Check Add / Remove Programs.  No restart was required for it to start working.
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