The 'Joke.Win.Stript' is a simple joke program.
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Being run it imitates Windows having fatal errors by opening series of messageboxes with error messages. After that another messagebox appears with the text:
Are you sure you want to format the hard drive ?
There's only 'OK' button in this messagebox, so the user has to press it anyway. Then the joke opens another dialog with hard disk format progress indicator and the text:
Formatting hard disk. Push Escape to cancel.
If you press 'Cancel' button there appears a messagebox with the text: "Necessary files not found!". After that or when progress indicator reaches 100%, the screen is filled with garbage and the joke waits for keypress. Then the final messagebox appears with the following text:
I scared you, didn't I ?
English and German versions of this joke exists.