Well, UBCD4Win has some anti-virus tools on it, but an even better one which contains more AV programs on it is the (just plain) Ultimate Boot CD:
http://www.ultimatebootcd.com/You need the Ultimate Boot CD if you want to:
Run floppy-based diagnostic tools from CDROM drives. More and more PCs are shipped without floppy drives these days, and it is such a royal pain when you need to run diagnostic tools on them.
Free yourself from the slow loading speed of the floppy drive. Even if you do have a floppy drive, it is still much much faster to run your diagnostic tools from the CDROM drive, rather than wait for the tool to load from the floppy drive.
Consolidate as many diagnostic tools as possible into one bootable CD. Wouldn't you like to avoid digging into the dusty box to look for the right floppy disk, but simply run them all from a single CD? Then the Ultimate Boot CD is for you!
When you boot up from the CD, a text-based menu will be displayed, and you will be able to select the tool you want to run. The selected tool actually boots off a virtual floppy disk created in memory.
Ultimate Boot CD has tools in the following categories:
Hard Disk Installation, Hard Disk Diagnosis, Hard Disk Device Management, Hard Disk Wiping, Hard Disk Cloning, Hard Disk Sector Editing, Partition Tools, Boot Managers, File Tools, NTFS Tools, System Burn-in Test, CPU Test, Memory Test, Peripherals Test, CPU Information, System Information, Benchmark Applications, BIOS Utilities, DOS Boot Disks, Antivirus Tools, Network Tools.