Glad it helped. I'd also want to compare a Clean Reinstall which often solves similar problems that can be caused by poorly written bloatware. Chances are more meager software which Win7 delivers could avoid this, or it is often caused by confluence of bloatware none of which is needed.

So you can uninstall all the bloatware then run Updates to see what Win7 wants it replaced with, or save a backup image to wipe the drive and start fresh with a Clean Reinstall - Factory OEM Windows 7 which has vastly improved performance for over a million consumers here without a single complaint. You could even shrink C to reinstall from boot to compare side by side.

Or you can keep what you have and always wonder what could have been if you had nAtive Win7 and not a ruined shell of it.