Ultra Defragger is a rogue antispyware program that spreads on computers using Trojans through system vulnerabilities. The purpose of this malicious application is to rip computer users off by selling a fake system optimization tool. As soon as Ultra Defragger is installed to the system it is started right when computer is restarted. The same repeats every time you log in Windows.

Ultra Defragger runs system scan and states that your system has hard drive and memory issues. Here is how the messages may look like:

Requested registry access is not allowed. Registry defragmentation required
Read time of hard drive clusters less than 500 ms
32% of HDD space is unreadable
Bad sectors on hard drive or damaged file allocation table
GPU RAM temperature is critically high. Urgent RAM memory optimization is required to prevent system crash
Drive C initializing error
Ram Temperature is 83 C. Optimization is required for normal operation.
Hard drive doesn't respond to system commands
Data Safety Problem. System integrity is at risk.
Registry Error - Critical Error

In order to fix that you are offered to purchase a full version of Ultra Defragger. That’s a main goal of its creators – to swindle your money away.

If your system has been infected with Ultra Defragger, you will probably find it difficult to run any of your executables. Instead of that the program will display a notification stating that a hard drive error occurred or simply saying that Windows cannot find the program you requested for.

Moreover, the program is responsible for tons of critical error messages appearing from Windows taskbar. Some examples of them:

Critical Error!
Damaged hard drive clusters detected. Private data is at risk.

Critical Error
Hard Drive not found. Missing hard drive.

Critical Error
RAM memory usage is critically high. RAM memory failure.

Critical Error
Windows can't find hard disk space. Hard drive error

You should get rid of Ultra Defragger if it happened for you to detect it on your system. consult our provided removal guide below and remove Ultra Defragger quickly and easily.