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Windows 7: Drive letters not assigning to DVDROM or external drives on notebook

12 Jun 2013   #11
hillsdave

Windows 7 Pro 64bit
 
 

Quote   Quote: Originally Posted by Kaktussoft View Post
Quote   Quote: Originally Posted by hillsdave View Post
no, same thing happens
Are you refering to post #6 or #7 (or both)?
Post #6


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12 Jun 2013   #12
jumanji

Windows 7 Home Premium 32 bit
 
 

You may go ahead with Kaktussoft's instruction/s.

I am just curious to know as to when this problem started. If none of the suggestions work, you may try to restore your system to a point before this problem surfaced.
My System SpecsSystem Spec
12 Jun 2013   #13
hillsdave

Windows 7 Pro 64bit
 
 

ok, both usb & dvd working in safe mode, still had to assign drive letters manually though.

Drive letters not assigning to DVDROM or external drives on notebook-screenshot.jpg


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12 Jun 2013   #14
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by hillsdave View Post
ok, both usb & dvd working in safe mode, still had to assign drive letters manually though.

Attachment 272264
And usb & dvd still have drive letters now in normal boot? Can you change the drive letters now as well? If not... are the reverted back to previous drive letters?
My System SpecsSystem Spec
12 Jun 2013   #15
hillsdave

Windows 7 Pro 64bit
 
 

No, in normal boot problem still exists
My System SpecsSystem Spec
12 Jun 2013   #16
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by hillsdave View Post
No, in normal boot problem still exists
So you were able to make it work in safe mode. usb and dvd has drive letters then. After that you did reboot normally. Drive letters were gone then? Reboot to safe mode... still gone?

Second test: Boot to safe mode and give usb and dvd a drive letter. Reboot again to safe mode. Drive letters are still active and working?
My System SpecsSystem Spec
12 Jun 2013   #17
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

In safe mode (after assigning drive letters succesfully) enter "command prompt":
Code:
reg  export  HKLM\SYSTEM\MountedDevices  d:\safeboot.reg
In normal boot mode enter "command prompt":
Code:
reg  export  HKLM\SYSTEM\MountedDevices  d:\normalboot.reg
Post d:\safeboot.reg and d:\normalboot.reg. You may delete the 2 files afterwards.
My System SpecsSystem Spec
12 Jun 2013   #18
hillsdave

Windows 7 Pro 64bit
 
 

Quote   Quote: Originally Posted by Kaktussoft View Post
Quote   Quote: Originally Posted by hillsdave View Post
No, in normal boot problem still exists
So you were able to make it work in safe mode. usb and dvd has drive letters then. After that you did reboot normally. Drive letters were gone then? Reboot to safe mode... still gone?

second test: Boot to safe mode and give usb and dvd a drive letter. reboot again to safe mode. drive letters are still active and working?
1. Assigned in safe mode, working. Rebooted in normal mode, drive letters gone, rb in safe mode, still gone.

2. Assigned in safe mode, working. rb in safe mode, still working.
My System SpecsSystem Spec
12 Jun 2013   #19
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by hillsdave View Post
Quote   Quote: Originally Posted by Kaktussoft View Post
Quote   Quote: Originally Posted by hillsdave View Post
No, in normal boot problem still exists
So you were able to make it work in safe mode. usb and dvd has drive letters then. After that you did reboot normally. Drive letters were gone then? Reboot to safe mode... still gone?

second test: Boot to safe mode and give usb and dvd a drive letter. reboot again to safe mode. drive letters are still active and working?
1. Assigned in safe mode, working. Rebooted in normal mode, drive letters gone, rb in safe mode, still gone.

2. Assigned in safe mode, working. rb in safe mode, still working.
Boot normal boot and safe mode use registry key HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices for drive letters. Something in normal boot removes them?! So win7 can read/write/delete to that key.

You logged in as same user in safe mode an normal mode?

It looks like something is monitoring registry key HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices and does nasty trick.

Try a clean startup Troubleshoot Application Conflicts by Performing a Clean Startup same problem?
My System SpecsSystem Spec
12 Jun 2013   #20
hillsdave

Windows 7 Pro 64bit
 
 



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 Drive letters not assigning to DVDROM or external drives on notebook




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