I recently did a scan of my local disk (a thorough one) and the results came back with all the files picked up being from the folder saved for the game Crysis. For the most part they were files that could not be opened. A few, however, were called decompression bombs. Now, the method to install these games came from Direct2Drive, a service that downloads and installs games directly to your computer. Could Avast! be picking up the huge files that the service uses to install the games as possible threats? And since I’ve never modified the game in any way, should I be worried about these results at all?
From what I’ve read here, a decompression bomb is a rather over-emotive term to describe a file that is packed with an unusually high compression algorithm. (Whatever that means.)
Basically, much data, little space.
In the past this was apparently a frequently used malware ploy.(Pack a lot of malicious content into a small download? Suitable for dial up infecting, perhaps.)
Not so much now.
Personally, I would not be worried.
Use a demand scanner such as MBAM or Superantispyware for peace of mind, perhaps.