system
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RejZor,
If you are referring to the situation regarding the change where currently produced drives from a number of the main manufacturers are no longer seen as “removable”, then I can only say there is a plethera of supporting documentation available on line about that.
If you are saying that you don’t think that is a factor in the making of an Avast rescue USB flash drive, then I can say I have successfully produced Avast rescue USB flash drives on 2 different Transcend 4GB units, 3 Dick Smith Electronics Cat XM1450 8GB units (these identify as USB DISK 2.0 PMAP), 1 Sandisk Cruzer Micro 8GB (very early model) and one 8 GB Sandisk Cruzer Switch (about two years old and seen as removable). They have all booted without issue on this PC (Intel DQ67SW MB, Intel i7) using the F10 key to open the Boot menu, and selecting the removable USB flash drive from there.
Conversely, attempts to make Avast rescue USB drives on 4 Sandisk Cruzer Switch 8GB flash drives, all of which are the new “Windows 8"” type (and are not seen as removable) have failed. 2 of these drives seem to work well enough as general purpose USB flash drives, but also can’t be made into bootable Paragon recovery drives. Despite being seen by Windows 7 64 bit as normal hard drives, Paragon’s WinPE recovery builder doesn’t see them as valid destination media because they appear as normal hard drives. The other two are totally unreliable and more often than not have to be reallocated a drive letter when ever they are inserted just to get windows to see them.