Title bar accent color won't change to default.

I've had this issue before, it never got resolved. I've tried stuff like: Navigate in regedit to DWM and set Color Prevalence to 0 (REG_DWORD), and Turn accent title colors off in settings, even did a system scan, updated my PC, checked for malware... None of that worked. I even restarted my pc, and tried it again. It happened somewhere around the beginning of may. It really ruins the look of windows and i have to deal with this ugly color. The black box and stuff around it looks worse (the - [] X). I wouldn't complain if it didn't give that black box around the icons. It'd be acceptable if the update didn't ruin the color of my windows, and also, there's a fat border around the window, which again looks very ugly. All i want is to get that clean window look back again. I'm not going to reset my PC for some dinky thing. It'd take me weeks to install everything, and I'd loose on my projects and stuff. Here's the image further specifying my problem.96