Some comments:

More code is needed in order to have an accurate and reproducible solution to this problem.

-First: use / instead of \\.
This reduces the number of "leaning toothpicks", "\\\\".
In Perl, "/" always works instead of "\\".
In Windows XP+, "/" or "// "almost always works".
There are some expections to this (where the backslash
\ or \\ is needed).

-Second: qx is rare: qx.
Perhaps "system" or other method is better?
I just note that qx is rare.
my $return = `some comand`;
would be more common.

-Third: File::Find
There is no returned value from File::Find. If you meant that by the subroutine find().

Update:
Here is the case where you need the "\" on the Windows command line:

C:\Projects>cd c:/temp
The system cannot find the path specified.

C:\Projects>cd c:\temp

C:\TEMP>
[download]

A directory path in Perl doesn't use the Windows command line. This weird situation only happens if you are running a Windows shell command and starting from the "drive"'s root.

this is ok....
C:\TEMP>cd ../temp/somedir

C:\TEMP\somedir>
[download]