In earlier beta testing days of Windows 7, it was possible to remove the "Blur" effect from window borders (window titlebar, etc) but the functionality was removed in later builds. Even the RTM build doesn't contain this functionality.
We just needed to alter a DWORD value in Registry Editor and the Blur could be removed.
No need to get sad. "PacMani" @ DA has created a small batch script which replaces 2 RTM system files with the beta ones and also incorporates the required registry DWORD values automatically. So you can get the good old Beta functionality back in RTM build.

Simply download the ZIP file using following link:
How To Instructions:
1. Extract downloaded ZIP file and run "Patch Blur x86.bat" file. If you are using x64 bit version, run "Patch Blur x64.bat" file.
2. It'll take a few seconds and you'll see window without blur.
3. If you want to put the blur back, run "Enable Blur.bat" file. And if again you decide to remove the blur, run "Disable Blur.bat" file.
4. Although you would not need to run "Unpatch Blur.bat" ever, but in case you want to restore the default system files back, run it.
This article was posted by VG in following section: Windows 7.
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MenDart
patch must run an administrator
MenDart
For Win7 32-bit same like 64-bit
Just a dream
thank you very much !!!
Audiofeeline
I use the final Windows 7, I tried to run the patch as administrator but it only disable Aero. I tried to change registry as it says in comment and it doesn't work too... Anyone knows a working solution?
Thanks!
Audiofeeline
Ok, I know why it didn't work. We have to disable the UAC before running the patch. It would be great thing to add this in your post! Thanks for the tips! ;)
PacMani
Haiz,
I updated the scripts. The problem was the english string "administrators" which wouldn't work out on localized systems. Now the scripts read the localized string before applying the command.
Riddle
Hello
Is there any way to get no blur on Vista, or could this work with Vista?
Uewd
THANKS A LOT.
Uewd
How can we make the taskbar without blur?
Uewd
On some websites I'll see that they are having a different window shadow. It is not like the default window shadow. How can we do that?