Decompression Bomb?

[Techtronic]

Just completed a boot-time scan and was surprised by this error message:
"The File is a Decompression Bomb:Error 42110"
The error refers to the file  tih_s_e.exe  which is the installation executable for Acronis True Image. About 30 days ago I ran the same boot-time scan and there were no error messages for this file. Oddly enough, when I scan the same file in Windows, avast completes the scan with the "No Threat Found" message.  Running avast IS 6.0.1367, Win 7 Pro x64. What's going on

[iyogisolutions1]

Quote from Igor (avast! team)

decompression bomb is just something that unpacks to an unusually big amount of data even though it's rather small (i.e. has a high compression ratio, for example). It's nothing to worry about, you are just informed that avast! will not try to unpack the archive (you may not even know that it's an archive, but it seems like it is) because it may take VERY long to process.

http://forum.avast.com/index.php?topic=15389.msg131213#msg131213

[Techtronic]

Ok Thanks!

But now I have another question: Why did the previous boot-time scan had no issues scanning this file? What has changed??

[iyogisolutions1]

There wont be a specific answer for that.. But may be some updates in the Behavior Shiled can be the issue.