Strange System Variable set

[rudolf.bendl@extern.sdv-it.de]

Hi All,

for whatever reason I have strange entries in my system variables  like:

sh-3.2$ set
!::='::\'
!C:='C:\Users\a00bend'
ALLUSERSPROFILE='C:\ProgramData'
APPDATA='C:\Users\a00bend\AppData\Roaming'
AsdisPfad='d:\Users\ASDIS'
BASH=/usr/bin/sh
BASH_ARGC=()
BASH_ARGV=()
BASH_LINENO=()
BASH_SOURCE=()
....

I cannot get rid of these using "unset !C:" Is there a way to delete 
system variables?

What can I do? 
Rudolf



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