2

Just clear your temp folders.

The decompression bomb is probably a very poor description, something from a long time ago when malicious practice used to heavily compress a file so that it was quite small but when uncompressed was very large and in old systems with low resources, etc. it could crash the system.

So it just means that when uncompressed this file would be very large, many .cab (cabinet) files will be vary large.

Files that can’t be scanned are just that, not an indication they are suspicious/infected, just unable to be scanned.