The installation of Steam might be corrupted, please follow the instructions below to manually remove Steam:
1. Exit Steam.
2. Navigate to your Steam directory. (Typically C:\Program Files\Steam or C:\Program Files\Valve\Steam)
3. Delete all of the contents of your Steam directory.
When complete, make sure the Steam registry entries have been removed. While doing the following, please be aware that the Windows registry is a very sensitive part of Windows. Mistakes can render your system unstable so be VERY careful when making any changes.
In the left-hand column of your registry editor, navigate to: HKEY_CURRENT_USER\Software\Valve\Steam.
Right-click on Valve, select Delete.
For 32-bit operating systems:
In the left-hand column of your registry editor, navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Valve\.
Right-click on Valve, select Delete.
For 64-bit operating systems:
In the left-hand column of your registry editor, navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Valve\.
Right-click on Valve, select Delete.
When completed please close the Registry Editor, restart your computer and try the installation again.
Please re- download Steam
If after the above, the issue persists then please refer to this entry from the Steam Support website regarding updates stalling at a certain percentage.
1. Exit Steam.
2. Navigate to your Steam directory. (Typically C:\Program Files\Steam or C:\Program Files\Valve\Steam)
3. Delete all of the contents of your Steam directory.
When complete, make sure the Steam registry entries have been removed. While doing the following, please be aware that the Windows registry is a very sensitive part of Windows. Mistakes can render your system unstable so be VERY careful when making any changes.
In the left-hand column of your registry editor, navigate to: HKEY_CURRENT_USER\Software\Valve\Steam.
Right-click on Valve, select Delete.
For 32-bit operating systems:
In the left-hand column of your registry editor, navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Valve\.
Right-click on Valve, select Delete.
For 64-bit operating systems:
In the left-hand column of your registry editor, navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Valve\.
Right-click on Valve, select Delete.
When completed please close the Registry Editor, restart your computer and try the installation again.
Please re- download Steam
If after the above, the issue persists then please refer to this entry from the Steam Support website regarding updates stalling at a certain percentage.