2502, 2503 errors on Windows 7

[pbhales]

Since upgrading to Windows7 I have been unable to update software; at each attempt, I receive first a 2503 then a 2502 error, without explanation.
-date and time are correct
-happens whether virus and firewall are on or off

-attempting to use the uninstaller program also fails.

This is clearly a common problem judging by the number of queries, but I have yet to see any coherent solutions posted.

fingers crossed!
pbhales

 

[Bill2]

Try these methods.

Method 1
Unregister Windows Installer, and then reregister Windows Installer. To do this, follow these steps:

1. On the "Start" menu, click "Run.

2. In the "Open" box, type "msiexec /unreg", and then press ENTER.

3. On the "Start" menu, click "Run".

4. In the "Open" box, type "msiexec /regserver", and then press ENTER.

Method 2

Check permissions within the Installer folder. To do this, follow these steps.

1. Click on Start and in the Start Search bar > type in > c: /windows/installer.

2. Right click on c: /windows/installer at the top under programs and click properties.

3. Click on the security tab > Verify if System and Administrator account has Full access permissions.

4. The Everyone account should have read and execute permissions, List Folder Contents, and Read.

Source: http://social.answers.microsoft.com/Forums/en-US/w7repair/thread/28b361b7-b2d7-494d-8470-5969f6850f5a