Wrong default programme

Hi, I accidently set Notepad as my default. Now I can't download,run or open certain files and programmes. I tried to use the Snippet tool to make a picture. So, I copied what it looks like. All other files I try to open looks similar. Please Help..!!
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. @ % S y s t e m R o o t % \ S y s t e m 3 2 \ S n i p p i n g T o o l . e x e , - 1 5 0 5 2 3 . . \ . . \ . . \ . . \ . . \ . . \ W i n d o w s \ S y s t e m 3 2 \ S n i p p i n g T o o l . e x e " % w i n d i r % \ s y s t e m 3 2 \ S n i p p i n g T o o l . e x e ( * 1SPSâŠXF¼L8C»ü“&˜mÎ 
*%windir%\system32\SnippingTool.exe % w i n d i r % \ s y s t e m 3 2 \ S n i p p i n g T o o l . e x e `  *X win-6qpucelvrja ¸=ÃÃåOµ§r’‘Íüh^@fžò%ߟÂÚ0þ¸=ÃÃåOµ§r’‘Íüh^@fžò%ߟÂÚ0þ

yes i did merge, log off and back on. Everything is still the same.. I still get this in notepad when trying to open a program

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LÍ!This program cannot be run in DOS mode.

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I am not sure it is the same fix but check this one out Restore .EXE File Association in Windows 7/Vista After Incorrectly Associating it With Another Program - The Winhelponline Blog

It involves deleting a reg key then merging. The screenshot is the same as your problem.

thanks for the help but I managed to fix it by following these steps in the video.
https://www.youtube.com/watch?v=1IuXbXrYpvo

elize said:

thanks for the help but I managed to fix it by following these steps in the video.

That is our tutorial linked in that video. The same one whs linked in post #2,

whs said:

Did you try this: Default File Type Associations - Restore