Sorry to reply late.
1, You said that you uninstalled Wise Care 365, and reapplied your power management and screensaver settings, then rebooted and everything was working again.
It is impossible. Wise Care 365 is only a tool to clean junk files which created by system and applications. It can not block power management and screensaver.
And we have tested this on XP several times, but no problem on XP. And we will continue to test it.
2, Your camera software problem. You means after reinstalling software and drivers it is still giving your same problem.
So, it is not wise care 365 delete some files cause your problem.
If you have used System Optimizer in Wise Care 365, click System Tuneup----System Optimizer----System Default, reset system default settings.
If you have used PC Checkup, click Custom Checkup---Security Projects, unchecked Windows Remote Desktop Connection, unchecked Windows Home/Private Firewall, unchecked Windows Public Firewall.
Then click Start----Run---type services.msc press Enter, find out Terminal Services, double click it, reset its startup type as Automatic, OK, and restart system.
3, Reinstall your ATI graphics driver.
4, If you don't have enough technical knowledge, please never to use "GPU Tweak" to tweak your graphics.