After 3 days of rigorous searching through the various internet forums I found how to make Windows 8.1 frames look exactly like Windows 7. I installed Win 8.1 on VMware and tested my self. Results are awesome. I have attached images of the results. Just follow the steps & you'll be in the clear. 1. Install BigMuscle AeroGlass for windows 8.1. v1.2.5 (this is the version I used) to C:\ drive root only. Do not change the path in the installer. Install as it is to C:\AeroGlass. Don't forget to tick "Install glass shiny atlas resource". 2.Setting up Aero Glass ThemeAtlas file. This is the most important!!! go to the following h**p://w*w.msfn.org/board/topic/170233-aero-glass-themeatlas/ use the 3rd post from the top by "infinality". From the two theme atlas files, use the one named "post-383443-0-34934800-1383873674" (save both atlas files to your computer.) Create a folder named ThemeAtlas inside the C:\AeroGlass directory and paste the .png image named "post-383443-0-34934800-1383873674" to that directory. It is also ok if you just paste it to C:\AeroGlass directory. Right click the desktop and click personalize and click the "color" options and choose a color & reduce the color intensity to 0. 3. Configuring AeroGlass UI. Open BigMuscle AeroGlass GUI as admin. get the tool from here - Testing version of GUI application to modify Aero Glass parameters - h**p://w*w.glass8.eu/download.html Themes & appearance settings. tick--theme atlas image---& browse for the Theme Atlas file that was set in step 2 above. Click save. Now your windows border and buttons should change. The window frame borders will have white color around them which gives out a glowing effect. This is the thing missing in most of the themes and other atlas files without which you cannot make win 8.1 window frames & borders look exactly like windows 7. (I think.......) 4. Appearance section, move the slider to put--blur effect radius to 3/4 or your preference. 5. Put--Glass geometry radius--to--Win7 Style or your preference. 6. put--Caption glow effect mode--to--Use atlas image or your preference. 7. Caption color--Black or your preference. 8. On the Glass Color tab adjust the settings to your preference by moving the sliders to change colors & effects of the window borders and save and exit. DONE!!! Now your Windows 8.1 windows looks just like the windows of windows 7 except for round edges. P:S; The only thing I noticed that does not work properly here & there is the white background behind the title bar text of windows, which doesn't matter mostly.