Go to (the original Aero Glass project). Download the version for 8.1. Run AeroGlass.exe . It will download symbols from Microsoft (this is normal). You will see transparency return.
Several dedicated packs can automate this transition, handling everything from icons to system sounds. Revert8Plus windows 81 to 7 transformation pack
Before you begin the transformation, keep these safety tips in mind: How to make Windows 8.1 Look Almost EXACTLY Like Windows 7 Go to (the original Aero Glass project)
The primary motivation for using such packs is functional. While Windows 8.1 offers significant technical advantages over its predecessor—such as native USB 3.0 support, full UEFI firmware compatibility, faster boot times, and better memory management—many users found its default "Metro" or "Modern" UI (with its full-screen Start screen and hot corners) to be unintuitive. These packs aim to provide the performance and hardware support of Windows 8.1 with the classic, familiar interface of Windows 7, effectively giving you "the best of both worlds". It will download symbols from Microsoft (this is normal)
Let me know which you want to fix first!