Tosh L450D - Win 7 Home Premium
All other updates for Windows and Office install without problems.
SP1 fails with 800B0100 error
CheckSUR tool passes with no errors in log.
SFC - no problems found
Potential screwup factors
1) Machine is two years old - but still had the original trial of McAfee installed, which hadn't ever been activated! Ripped that out, ran MCPR, installed MSE. Surprisingly, no significant malware found.
2) no malware scans ever run on the machine - Malwarebytes installed, running full system scan as I write this.
otherwise, it seems like the machine just came out of the box!
Once the malware scan is finished, I intend to try a standalone SP1 install and see how that works.
Any suggestions gratefully received