Windows Update Troubleshooting

Sometimes due to the infection of viruses you may not be able to update the your genuine version of Windows. Most people use to format and re-install the Windows as soon as they got such kind of problems. But that is not the immediate solution except in a worst case scenario. In fact there are more simple things to do before you decide to re-install of Windows. OK I am not going to explain about these things any further. Lets see how to troubleshoot Windows update problems.

Step 1:

This may due to BITS problem.

Step 2:
You may find at a lot of places in which the word %SystemRoot% had been changed to %fystemRoot% in registry.

Go to Start->Run->type regedit and [ENTER]
search the word fystemRoot (Ctrl+ f)
Go to the ImagePath key and click Modify

If you get an Error saying "Cannot edit ImagePath: Error writing value's new contents."
Right click the folder BITS or Wuaserv (You will most likely have to do both) and select "Permissions..."
Select full control
Go back to the ImagePath key and click Modify again

Change the fystemRoot to SystemRoot at those places.

Check these as well

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services (BITS and Wuauserv)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet003\Services (BITS and Wuauserv)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services (BITS and Wuauserv)