Thanks for the information. Have a new SSD on the way to upgrade my laptop. I'll try doing the clean install on that (have my current hard drive as a backup if issues occur).

I have an HP Pavilion laptop that came with Windows 8 pre-installed. I upgraded it to Windows 8.1 a few months after purchase.

Early last year I installed Windows 10 Preview during the beta...

I haved moved my Windows 7 64bit install from a Dell Precision 380 (Pentium D and Nvidia 6600 LE) to a Dell Precision T3400 (Intel Core 2 Quad Q6700 2.66Ghz and Nvidia GT 610.

Windows 7 is updated...