This tutorial will show you how to make a fake error if you just follow the steps below:
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Step 1:
Open notepad
Step 2:
Type the following into notepad:
x=MSGbox("Your Text HERE", 0+16, "Your title")
***You can replace the your text here and the your title with what ever you want.
Step 3:
Save it as anything.vbs
***By anything, I mean the name doesn't matter, only the vbs extension.
Step 4:
Open it and enjoy! You can do my internet explorer prank with this as well!