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Every executable on my Win 7's Desktop got associated with Notepad

I was opening a zipped putty file sent by a colleague who suggested to me to use
Notepad to open after unzipping.

I don't know what I've clicked or selected: now every single executables (MS outlook,
Chrome, IE, Google Docs, 7zip, putty, Broadband on Mobile, etc) are showing Notepad
icons & when I double-click on them, Notepad edits those executables & show their
contents (often containing garbage characters).

What can I do to "de-associate" the Notepad associations?

I'm on Win 7 Professional x64
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sunhux
Asked:
sunhux
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5 Solutions
 
JohnBusiness Consultant (Owner)Commented:
It appears your colleague sent you malware. Putty works just fine. I use it.

Run your own antivirus application and do a full scan. Follow this by a scan using Malwarebytes.

When complete, open an admin command prompt and run SFC /SCANNOW. Allow to complete. Close out and now shut down the computer.

Start back up and test. Any improvement?
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JohnBusiness Consultant (Owner)Commented:
Also try re-associating an executable with its proper application. Do this in Control Panel, Default Programs. Can you do this?
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Lior KarasentiCommented:
Try the following program: https://toolslib.net/downloads/finish/25/get/xEMX/
Click on "Tous" then click on "Restaurer". It should then restore every association listed and fix the problem.
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☠ MASQ ☠Commented:
You've probably just reset the default program to open .exe's with Notepad.  If so re-associating the .exe extension with Lior's link above will fix this but if you just want to target .exe associations download and run the registry file here.

Just a note that Lior's link will download a file with an .scr extension.  This is deliberate as, of course, if it downloaded as an .exe you wouldn't currently be able to run it :)
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sunhuxAuthor Commented:
For sure it's not a virus because my laptop is up-to-date with Officescan AV
& Malwarebytes scan did not fix it.

Lior's utility is in a non-English language but I ran the .scr anyway & selected
.exe to restore (ie I click "Restaurer") & it actually edit using notepad the
file which shows up a garbaged file.

I've also tab to the button "Restaurer" & press <Space> to select it & it
edits the file again, showing a garbaged file
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sunhuxAuthor Commented:
Have also downloaded & run MASQ's default_EXE.reg but it did not restore back
the icons on the Desktop too : still doing "notepad of the file", showing garbage.

Do I need to reboot after running the above tools?  I'll try it tomorrow as it's
midnight now my time
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sunhuxAuthor Commented:
After running Lior n defaultreg.exe, I also do a cold reboot of the laptop, still seeing all Desktop icons as Notepad icon n clicking any one of them wud edit them using Notepad which gives garbage content.   Wat can I do next?
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JohnBusiness Consultant (Owner)Commented:
You can try running Windows 7 Repair Install. You need a working recovery partition or the Windows 7 DVD. Here is a Seven Forums tutorial to assist with this.

http://www.sevenforums.com/tutorials/3413-repair-install.html

If this fails to fix the issue,  the next step is to back up the computer, format, and reinstall Windows 7
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☠ MASQ ☠Commented:
- forgot the obvious one!

Have you tried a System Restore to a date prior to the Putty install?
http://windows.microsoft.com/en-GB/windows7/products/features/system-restore
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sunhuxAuthor Commented:
C:\Users\sunhux\AppData\Local\Google\Chrome\User Data\Default\JumpListIcons

Our laptop support chap renamed away the above, rebooted the OS & voila, the
icons are all back to what it was prior to the 'putty' incident.  Was told Win 7 will
recreate the above if it finds it missing & the newly created JumpListIcons restores it

Did not try "System Restore"
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JohnBusiness Consultant (Owner)Commented:
Thanks for the update!
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