It does have an extension indication it is a registry key. What it's for I don't know. It's safe to delete it as it's just a file. When you double click it it will add the values to the registry. But if you don't know what it's from I wouldn't add it to the registry.
Deleting files won't speed up your computer unless your hard drive is running out of free space it will only free up more space. If you remove programs that are starting up at boot, that will give you a performance gain.

You can see what is starting up at boot using msconfig, and uncheck anything you don't want starting at boot. (click start, run, type 'msconfig', hit enter. In msconfig, click startup tab.)

This is my favorite tool for controlling startup programs and process's. It's not free, but does have a trial period.
WinTasks 5 Professional - Process Management Made Easy