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Windows 7: Registry Question

30 Dec 2015   #1
copiman

Windows 7 Home Premium
 
 
Registry Question

I have 7 Home Premium 64 Bit. I was in the registry and noticed something. Under HKEY_CLASSES_ROOT> I have Unknown and Unknown_BU. I was wondering if this is normal. I checked a 32 Bit version and it does not have a Unknown_BU. Maybe someone who has 64bit version could check theirs foe me? I think I'm having an issue with the "open with" dialog box.


My System SpecsSystem Spec
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30 Dec 2015   #2
Baddog22556

Windows 7
 
 

I have HKEY_CLASSES_ROOT\Unknown but not Unknown_BU. Also HKEY_CLASSES_ROOT\Unknown\shell\openas\command\. This subkey is actually the action to open the "Open With" box for "unknown" files when windows can't find the suitable application to open a file with.
Backup your reg before playing in it.
My System SpecsSystem Spec
30 Dec 2015   #3
Anak

Microsoft Community Contributor Award Recipient

Win 7 Home Premium 64bit Ver 6.1.7600 Build 7601 - SP1
 
 

I only have the unknown key:

Registry Question-regunk.png

For background:
Open with - Add Program

And this may fix your problem, the download in step #1 will reset your unknown key to default: Open with - Opening to Notepad or a Error Fix
Check the bottoms of both tutorials there may be another tutorial under Related Tutorials that may apply to your situation.

As to the unknown_bu, that looks like a backup to the unknown key. You've been getting any error or warning messages?

If you haven't done it recently: Registry - Backup and Restore


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31 Dec 2015   #4
copiman

Windows 7 Home Premium
 
 

Thanks everyone. I don't actually get error messages always. The issue is when I try to open a file (PDF) received in yahoo mail, using Google Chrome, I do get an error and no way to get "open with". Sad thing is it works using IE and Firefox. You click download on the file and a dialog box opens at the bottom where you can "open", "save", or "cancel" in IE and in FF you get the "open with" dialog box. To make it worst, another PC (same model #) will give the option to "open with" using Google Chrome. I googled a little and found things pointing to the registry. Then I found the entries in the registry I referred to in the original post. Additionally, there have been numerous users over the past years on this particular PC including several small children.

I was thinking about doing a repair install to ensure the OS was good to go. I did an sfc /scannow and found no issues. I would really like to wipe this puppy and start all over but they have Office 2007 and MS has no download for it (I spoke with them). So, would a repair install hurt? Could the OS have some issues even though the scannow showed nothing?
My System SpecsSystem Spec
31 Dec 2015   #5
Anak

Microsoft Community Contributor Award Recipient

Win 7 Home Premium 64bit Ver 6.1.7600 Build 7601 - SP1
 
 

Quote:
So, would a repair install hurt?
It shouldn't, but read the top three boxes before you start: Repair Install

Quote:
Could the OS have some issues even though the scannow showed nothing?
We usually suggest to run the SFC scan at least three times with reboots in between to be sure, see the blue note box in option two: SFC /SCANNOW Command - System File Checker

You could also run a CHKDSK before you run those SFC scans.

Do you have an OS backup before you do the repair?
My System SpecsSystem Spec
31 Dec 2015   #6
torchwood

W7 home premium 32bit/W7HP 64bit/w10 tp insider ring
 
 

If youve used an optimizer program, one of the default options is to remove the open with link

Roy
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31 Dec 2015   #7
copiman

Windows 7 Home Premium
 
 

Ran chkdsk. Also ran scannow 3x and all is good.

Not sure what you mean by OS backup. Can you elaborate?
My System SpecsSystem Spec
31 Dec 2015   #8
bigmck

Windows 7 Home Premium 32-Bit - Build 7600 SP1
 
 

Quote   Quote: Originally Posted by copiman View Post
Ran chkdsk. Also ran scannow 3x and all is good.

Not sure what you mean by OS backup. Can you elaborate?
He means that you should have an OS backup done before you attempt the Repair.
My System SpecsSystem Spec
31 Dec 2015   #9
copiman

Windows 7 Home Premium
 
 

Quote   Quote: Originally Posted by bigmck View Post
Quote   Quote: Originally Posted by copiman View Post
Ran chkdsk. Also ran scannow 3x and all is good.

Not sure what you mean by OS backup. Can you elaborate?
He means that you should have an OS backup done before you attempt the Repair.

Do you mean a system image? Never heard the term OS backup.
My System SpecsSystem Spec
31 Dec 2015   #10
bigmck

Windows 7 Home Premium 32-Bit - Build 7600 SP1
 
 

Quote   Quote: Originally Posted by copiman View Post
Quote   Quote: Originally Posted by bigmck View Post
Quote   Quote: Originally Posted by copiman View Post
Ran chkdsk. Also ran scannow 3x and all is good.

Not sure what you mean by OS backup. Can you elaborate?
He means that you should have an OS backup done before you attempt the Repair.

Do you mean a system image? Never heard the term OS backup
.
Yes
My System SpecsSystem Spec
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