First thing, where did you get your SH4 - Steam, Amazon? Disk or Download? What folder did you install it in? You do NOT want to be in any Windows "protected" folders, such as Program Files (x86) or others...
Then there is THEBERBSTER's gathering of all of the important info on recent Windows updates and graphics issues:
Total Black Screen > Sound No Picture > Picture No Sound Fixes
... and the "old reliable" (with the emphasis on the word "old"):
Nvidia tweaks to SH3/SH4
some of which may no longer apply...