Hi Mahesh
I'm afraid your instructions won't work for anyone who upgraded from Windows 8 - I've had exactly the same issue as the others on this forum only after upgrading to 8.1 with a single boot system on an HP DV6 laptop with AMD Athlon II. I tried to repair Windows, but it gave a message saying files were missing and to use the original DVD and since I only have Windows 8 on DVD, I had to go back to Windows 8 first and everything was working fine until the Windows 8.1 upgrade notice came and then the problem reappeared after the 8.1 upgrade had been completed.
I'm wondering if this is an AMD CPU related issue - I am running an Intel i3 (Ivy Bridge) based Zotac Zbox with Win8.1 as a media PC with my TV and everything has been fine after the 8.1 upgrade.
However, as far as I'm concerned, it is still a Win 8.1 problem regardless of the workaround suggested. The software should "just work"!!
Another curious problem with Windows 8.1 is that Soundforge Pro 10e (which is ofiically Windows 8 certified and was running fine until the upgrade) had to be reinstalled as the OS 8.1 program manager advised (after the 8.1 upgrade install) that it wouldn't work until this was done. A lot of productivity time has been lost whilst I sorted out these issues.
I'm going back to Windows 7 - simply not good enough Microsoft!
Regards
Anthony