UBCD4Win is a live CD, that is, a CD "containing a bootable computer operating system [capable of being ran] on a computer lacking mutable secondary storage, such as a hard disk drive." (Wikipedia) In other words, with this live CD you can do almost everything you want, be it testing the RAM using Memtest, the HDD using HD Tune, or surfing the Internet using Firefox v3, and this, even if you are currently unable to boot into your everyday Windows XP installation or if your HDD has crashed. UBCD4Win is a recovery CD containing "software used for repairing, restoring, or diagnosing almost any computer problem." (UBCD4Win website) This is one of the best Live CDs, to be compared with Hiren's BootCD, and LiveDistros such as DSL and Knoppix. Used in combination with installables such as Simple TinyXP, this CD is considered an essential for most computer repairers.
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