Solved Change back to "Unknown Application"

sanfranman

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I was looking at the content of some .ui file types using the "open with" command and then selecting Notepad. Unfortunately I accidentally had the box ticked to open all files of this type with Notepad from now on.

The files were originally designated as being opened with an "unknown application". I can set these files to be opened by default with any program, but as it is not on the list how do I change it back to open with "unknown application"?

I know it's no big deal and it can stay that way without any problem , but things like that can annoy me at times :(

Any advice appreciated , thanks.

SFM
 

My Computer

OS
Windows 7 Home Premium 64bit SP1
Hello SFM,

If you like, you can download and merge the .reg file I attached below to unassociate that file extension. It will delete the common registry entries for the file extension to unassociate it. You may need to log off and log on to fully apply.

Hope this helps,
Shawn
 

Attachments

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Self built custom
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64-bit Windows 11 Pro for Workstations
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Intel i7-8700K OC'd to 5 GHz
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ASUS ROG Maximus XI Formula Z390
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64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz
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ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
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Integrated
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Logitech Z625 speaker system,
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HP Color LaserJet Pro MFP M477fdn,
APC SMART-UPS RT 1000 XL - SURT1000XLI,
Galaxy S23 Plus phone
What application? Many here .UI file types:
Google
Just uncheck the 'open with' (right click) and then "choose from" to open them
 

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Bruce ... somewhere in his 40's
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Windows 7 Ultimate 32bit SP1
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Intel(R) Core(TM)2 Quad CPU @ 2.40GHz, 2400 MHz
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INTEL/D975XBX2
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4 GB
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ATI Radeon HD 2600 Pro
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Samsung SyncMaster 914v
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1280 x 1024
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2/500GB each ... ST3500630AS ATA Device.
One is not connected
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Rocketfish 700 W
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G.Skill Gigabyte Chassis
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Standard PS/2 Keyboard
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Microsoft PS/2 Mouse
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DSL
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Avira Internet Security
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IE 11
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ATI HDMI Audio
Thank you both for your replies.

Shawn, your solution worked well and now all is back to normal again. :party:

Regards

SFM
 

My Computer

OS
Windows 7 Home Premium 64bit SP1
You're most welcome SFM. I'm happy to hear that you got it sorted. :)
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self built custom
OS
64-bit Windows 11 Pro for Workstations
CPU
Intel i7-8700K OC'd to 5 GHz
Motherboard
ASUS ROG Maximus XI Formula Z390
Memory
64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz
Graphics Card(s)
ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
Sound Card
Integrated
Monitor(s) Displays
2 x Samsung Odyssey G7 27"
Screen Resolution
2560x1440
Hard Drives
1TB Samsung 990 PRO M.2,
4TB Samsung 990 PRO PRO M.2,
TerraMaster F8 SSD Plus NAS
PSU
Seasonic Prime Titanium 850W
Case
Thermaltake Core P3
Cooling
Corsair Hydro H115i
Keyboard
Logitech wireless K800
Mouse
Logitech MX Master 4
Internet Speed
2 Gb/s Download and 100 Mb/s Upload
Antivirus
Malwarebyte Anti-Malware Premium
Browser
Google Chrome
Other Info
Logitech Z625 speaker system,
Logitech BRIO 4K Pro webcam,
HP Color LaserJet Pro MFP M477fdn,
APC SMART-UPS RT 1000 XL - SURT1000XLI,
Galaxy S23 Plus phone
Won't work for me (!?)

Brink; I did exactly the same thing only while in the SYSTEM 32 folder.
Tried the 'fix' , opened it, Merged it , clicked yes, then OK, rebooted, and still have the files opening with Wordpad.
:confused: Dumb mistake admittedly... but that aside, am I missing something?
Thanks
 

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Computer Manufacturer/Model Number
Custom Build
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Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
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AMD Phenom(tm) II X3 720 Processor
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Gigabyte Technology Co., Ltd. GA-MA785GPMT-UD2H
Memory
4.00 GB
Graphics Card(s)
ATI Radeon HD 4800 Series
Sound Card
(1) AMD High Definition Audio Device (2) Realtech H/D Audio
Screen Resolution
DELL 2405FPW (1920 x 1200 ) @ 75 Hz
Hard Drives
(1) Samsung SSD 840 Series ATA Device (2) WDC WD400BD-75MRA1 ATA Device
PSU
700w Kingwin Mach-1
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Avast
Browser
Firefox
Hello Idahjo,

Please go ahead and create a new thread with all of the details about your issue instead since it may not be exactly the same issue as the OP here. :)
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self built custom
OS
64-bit Windows 11 Pro for Workstations
CPU
Intel i7-8700K OC'd to 5 GHz
Motherboard
ASUS ROG Maximus XI Formula Z390
Memory
64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz
Graphics Card(s)
ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
Sound Card
Integrated
Monitor(s) Displays
2 x Samsung Odyssey G7 27"
Screen Resolution
2560x1440
Hard Drives
1TB Samsung 990 PRO M.2,
4TB Samsung 990 PRO PRO M.2,
TerraMaster F8 SSD Plus NAS
PSU
Seasonic Prime Titanium 850W
Case
Thermaltake Core P3
Cooling
Corsair Hydro H115i
Keyboard
Logitech wireless K800
Mouse
Logitech MX Master 4
Internet Speed
2 Gb/s Download and 100 Mb/s Upload
Antivirus
Malwarebyte Anti-Malware Premium
Browser
Google Chrome
Other Info
Logitech Z625 speaker system,
Logitech BRIO 4K Pro webcam,
HP Color LaserJet Pro MFP M477fdn,
APC SMART-UPS RT 1000 XL - SURT1000XLI,
Galaxy S23 Plus phone
Thanks Brink for your usual prompt reply. I was going back to delete my post as I found a system copy and reloaded it. All OK now and I will not be doing that dumb stunt again:o
I changed the HD that I thought I had my system images on and just located this one. Sorry I did not catch the post in time to delete it.
Thanks again..
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
CPU
AMD Phenom(tm) II X3 720 Processor
Motherboard
Gigabyte Technology Co., Ltd. GA-MA785GPMT-UD2H
Memory
4.00 GB
Graphics Card(s)
ATI Radeon HD 4800 Series
Sound Card
(1) AMD High Definition Audio Device (2) Realtech H/D Audio
Screen Resolution
DELL 2405FPW (1920 x 1200 ) @ 75 Hz
Hard Drives
(1) Samsung SSD 840 Series ATA Device (2) WDC WD400BD-75MRA1 ATA Device
PSU
700w Kingwin Mach-1
Antivirus
Avast
Browser
Firefox
No problem. I'm happy that you got it sorted. :)
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self built custom
OS
64-bit Windows 11 Pro for Workstations
CPU
Intel i7-8700K OC'd to 5 GHz
Motherboard
ASUS ROG Maximus XI Formula Z390
Memory
64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz
Graphics Card(s)
ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
Sound Card
Integrated
Monitor(s) Displays
2 x Samsung Odyssey G7 27"
Screen Resolution
2560x1440
Hard Drives
1TB Samsung 990 PRO M.2,
4TB Samsung 990 PRO PRO M.2,
TerraMaster F8 SSD Plus NAS
PSU
Seasonic Prime Titanium 850W
Case
Thermaltake Core P3
Cooling
Corsair Hydro H115i
Keyboard
Logitech wireless K800
Mouse
Logitech MX Master 4
Internet Speed
2 Gb/s Download and 100 Mb/s Upload
Antivirus
Malwarebyte Anti-Malware Premium
Browser
Google Chrome
Other Info
Logitech Z625 speaker system,
Logitech BRIO 4K Pro webcam,
HP Color LaserJet Pro MFP M477fdn,
APC SMART-UPS RT 1000 XL - SURT1000XLI,
Galaxy S23 Plus phone
hey brink,

does it work the same with the .tmp file,

pls, help me as i have changed the default program to hp solution center program.

I have already downloaded the other reg file you uploaded and merged it by changing its name to Default_tmp.reg i can,t find any changes, does this merge has any affect on other files.
 

My Computer

OS
windows 7 ultimate x64 bit
CPU
core 2 duo
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