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Windows 7

Device Manager appears blank in Windows 7 – Resetting Registry permissions

After having a customers machine in with a blank device manager, as well as blank in network connections, we discovered it was down to a registry permissions issue.

The easiest way is to reset all registry keys to default.

To do this:
Open a run dialog by pressing Windows Key + R
Type regedit
When it opens click file (in top left corner) and click export
Save your current registry somewhere as a backup
Close regedit

Download the following from Micrsoft website – SubInACL
Windows 7 isn’t listed as compatible operating system but it will work fine with it.
Install this and select c:\windows\system32 as the installation path
Open up notepad and paste in the following
@echo off
subinacl /subkeyreg HKEY_LOCAL_MACHINE /grant=administrators=f
subinacl /subkeyreg HKEY_CURRENT_USER /grant=administrators=f
subinacl /subkeyreg HKEY_CLASSES_ROOT /grant=administrators=f
subinacl /subdirectories %SystemDrive% /grant=administrators=f
subinacl /subdirectories %windir%\*.* /grant=administrators=f
subinacl /subkeyreg HKEY_LOCAL_MACHINE /grant=system=f
subinacl /subkeyreg HKEY_CURRENT_USER /grant=system=f
subinacl /subkeyreg HKEY_CLASSES_ROOT /grant=system=f
subinacl /subdirectories %SystemDrive% /grant=system=f
subinacl /subdirectories %windir%\*.* /grant=system=f
@Echo =========================
@Echo Finished.
@Echo =========================
@pause

Save the above as reset.bat
For ease I have already created this file for you, which you can download here. You will have to right click on this link & click save as, else it will just display the contents of the file
Your Anti-Virus may report this as a virus because it is a bat file but if you examine the contents of it then it contains the above.
Right click on this file and click “Run as administrator”
A command prompt will then open and will run through thousands of registry entries and files, it will go back to 0 several times but this is normal
For us this process took over an hour to complete
Once done it will say “Finished”. You can then restart your computer & all should be back to normal

If you get stuck or this all seems a little too much, why not give One Touch Services a call on 01784 77 04 02? or visit our Contact us page


Is your computer or laptop not working efficiently? One Touch Services offers repair services such as computer repair, laptop repair, laptop screen repair, virus removal, network support and PC repair in the Surrey and surrounding Hampshire, Berkshire & Greater London area.  Additionally, One Touch Services offers a mobile technician available by appointment for your convenience.