Does anyone know how to get that Mirar software off the computer?
Welcome to the forums, horse2007. 
This can be removed by both Spybot-Search&Destroy and Spyware Terminator.
Do you have either of these anti-malware programs?
It will be good if you download, install, update and run AVG Antispyware. Some users recommend SUPERantispyware, Spyware Terminator and/or a-squared (take care about false positives).
If any infection is detected, better and safer is send the file to Quarantine than to simple delete than.
If you still detecting any strange behavior or even you’re sure you’re not clean, maybe it will be good to test your machine with anti-rootkit applications. I suggest AVG, Panda and/or F-Secure BlackLight.
Also, if you still detecting strange behaviors or you want to be sure you’re clean, maybe making a HijackThis log to post here and, specially, scan and submit to on-line analysis the RunScanner log would help to identify the problem and the solution.
Hi horse2007,
Here are the removal instructions:
http://www.spywareremove.com/removeMirar.html
polonus