I answered, at least partially, yesterday about Avast's "VRDB" in your other Thread . After

my Post yesterday, I discovered a long thread in a sub-forum on the Avast Online Support

Forums. In that Thread, "Vlk", One of the Owners/Employees of Alwil Software, The Makers

of Avast Antivirus, said :

"in reality, the VRDB technology is going to be phased out soon. There are multiple motivations behind this, but the main one is that the malware landscape has changed dramatically since VRDB was first designed (~ year 2001) and we have to admit that its usefulness is now questionable (there have been only a very few file infecting viruses in the last couple of years, and I believe that none of these could actually be cleaned by means of the VRDB).

To that end, I'm afraid that instead of fixing VRDB for Vista, we will rather remove it from the other OS's . We were hoping this change could wait till v5, but maybe it will be made even sooner. "

VRDB stores the necessary info to restore executables (*.exe, *.com) files. VRDB is not a backup system, the stored information is very small (not the whole files).
Besides, only Win32 executables are processed. The VRDB data are stored in <avast>\Data\Integ\avast.int
So it's not a backup utility, but a restore feature of avast.

Based on this Info, each User has to determine the "Necessity" of initially "generating"

the "VRDB" and of subsequently wanting to "re-generate" it every 21 days. For Those with

Vista Operating Systems, the ONLY means to "re-generation" would be "Manually" or

selecting the "Generate the VRDB when computer is idle" Setting .

RGreen : On Avast's main GUI, there should be "Virus recovery database ( VRDB)" !?

As explained above, this is different from the Virus definitions .