Well, i did system optimization with years used tool, Advanced System Care, version 8 by IObit. I did same things i did on other PC running Windows 8.1 (both x86 and x64) without issues. Here are problems it caused:
1. Hard to read window names
2. Unsharp minimize and close buttons
3. Totaly...
asc8
browser issues
bugs
context menus
desktop
fix
font smoothing
graphics
iobit
metro ui
optimization
performance
personalization
registry
start menu
tab navigation
themes
user account
windows 10
windows 8.1