I was told by Logitech Help to rename the file <!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:0 0 0 0 0 0;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-520092929 1073786111 9 0 415 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman","serif"; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 70.85pt 2.0cm 70.85pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> WDF01000.SYS > WDF01000.BAK. this file is in system32. when I tried to rename, the following showed up: <!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:0 0 0 0 0 0;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-520092929 1073786111 9 0 415 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman","serif"; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 70.85pt 2.0cm 70.85pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> "Dateizugriff wurde verweigert. Sie bentigen Berechtigungen zur Durchfhrung des Vorgangs. Sie mssen die erforderlichen Berechtigungen von "TrustedInstaller" erhalten, um nderungen an dieser Datei durchfhren zu knnen. Wdf01000.sys Dateibeschreibung: Kernelmodustreiber-Framelaufzeit Firma: Microsoft Corporation Dateiversion: 1.9.7100.0 Erstelldatum: 22.04.2009 05:09 Gre 434 KB I dont know exactly, what "TrustedInstaller" is, and how to use it. My primary problem is: I used my Logitech Media Keyboard with Windows XP Professional. Now I want to use it with Windows 7, and the additional keys dont work. Logitech Help does not really know how to solve the problem, and gave me the advice to rename Wdf01000.sys, and to remove any entries concerning logitech from the registry before installing Logitech setpoint again. I uninstalled logitech setpoint by using the uninstaller, but I dont know how to open the registry and how to modify entries in Windows 7. These questions were not answered by Logitech. regards HR

Hi Hermann, you don't have the permissions to rename files inside the Windows folder. As I see, you are german, so you can read this tutorial here: http://www.winvistaside.de/forum/index.php?showtopic=663 You have to change the owner and give you full permissions. I hope I was able to help you. Andr"A programmer is just a tool which converts caffeine into code" CLIP- Stellvertreter http://www.winvistaside.de/

Hi, For more information about TrustedInstaller, please also refer to: What is Package Manager? Please note the section “Dependencies of Package Manager”. Supported Resource Replacement Mechanisms Thanks.Nicholas Li - MSFT

Hi Hermann, you don't have the permissions to rename files inside the Windows folder. I have to disagree, i have been trying to tweak my computer to change my performance, but every single time i try to rename something or change anything, "You must have permission from TrustedInstaller" or just plain old "Access Denied".. is there anything that can be done?

take ownership of the files and give your account full permissions. But don't do this. Which files do you want to delete?"A programmer is just a tool which converts caffeine into code" Want to install RSAT on Windows 7 Sp1? Check my HowTo: http://www.msfn.org/board/index.php?showtopic=150221