Ultra Defragger is a dangerous program that imitates being computer defragmenter and optimization program while in fact it's a completely useless application that was designed just to rip computer users off. It has nothing in common with a legitimate program so you shouldn't take it seriously.
Ultra Defragger spreads to computer systems through Trojan viruses which download and install the program without any users' authorization and without asking his permission. Once there, the program is configured to start automatically when computer boots up. This means that the program will load its scanner after each login to Windows. After few minutes of performance, the scanner reports about a bunch of errors that has been found in there and claims that your system requires defragmentation.
Moreover, Ultra Defragger causes tons of security notifications coming from Windows taskbar. These messages report about missing hard drive, RAM memory failure or other problems that may even cause your private data loss. All of such alerts are corrupted and they are only displayed in order to scare you out. All of them somehow will lead to an offer to purchase a full version of Ultra Defragger.
Please do not fall for this trick and make sure not to pay for Ultra Defragger. It will definitely be a waste of money. You are strongly advised to get rid of Ultra Defragger as soon as you detect it on your computer. If you have made a payment for it, contact your credit card company and dispute the charges.