Fix Windows 7 Update problem

[SIRavecavec]

Upgrade stops responding (hangs) at 62% when you upgrade to Windows 7?

SYMPTOMS: When you try to upgrade your computer from Windows Vista to Windows 7, the upgrade process stops responding at 62% indefinitely.

Additionally, Windows creates a file that is named system_drive:\$WINDOWS.~BT\Sources\Panther\setupact.log. If you examine the contents of the file, you notice the following information:

Note Generally, drive is drive C on the computer.

CAUSE: This problem occurs because the Iphlpsvc service stops responding during the upgrade.

Note Other services may also cause a problem in which the upgrade process stops responding at 62%.

RESOLUTION: To fix this problem automatically, restart the computer where the upgrade to Windows 7 fails at 62%. Your computer will roll back to Windows Vista. Either download the following fix to a flash drive or to a CD or return to this article on the machine where the upgrade fails. If you return to this article on the machine where you experience this problem, click the Fix this problem link. Click Run in the File Download dialog box, and follow the steps in the Fix it wizard.

Fix this problem Microsoft Fix it 50319

Note this wizard may be in English only; however, the automatic fix also works for other language versions of Windows. Note If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD, and then you can run it on the computer that has the problem.

To resolve this problem yourself, follow these steps:

1. Restart the computer. Then, your computer will roll back to Windows Vista.
2. Click Start, right-click Computer, and then click Properties.
3. On the Advanced tab, click Environment Variables.
4. Under System variables, click New.
5. Type MIG_UPGRADE_IGNORE_PLUGINS in the Variable name field.
6. Type IphlpsvcMigPlugin.dll in the Variable value field.
7. Click OK three times to close the dialog boxes.
8. Start the upgrade installation again.

Source: AllOSTech & Microsoft