Fix Patch Released for Windows 7 Upgrade Hangs at 62% Issue by Microsoft : KB975253

Microsoft have issued a "Fix it" patch for a Windows 7 upgrade problem that results causes system hang, while doing Vista to 7 upgrade.

Discription of proplem: When you try to upgrade your computer from Windows Vista to Windows 7,
the upgrade process stops responding at 62% indefinitely. 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%.
  • Important Do not use this resolution if the upgrade stops responding at a percentage other than 62% or if the log entries are not logged. 

To have us fix this problem for you :

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
lin. Click
Run
in the
File Download
dialog box, and follow the steps in the Fix it wizard.

Download Fix it for Me

Note :

  • This wizard may be in English only; however, the automatic fix also works for other language versions of Windows.
  • 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.

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