Easy enough, with the S/R, below, using the regular expression search mode :

SEARCH = (?i)(Z:\\)|(\\) and REPLACE = (?1/share/Public/)(?2/)

For instance, the two sentences, below :

The absolute path : "C:\Program Files(x86)\7-zip\Lang"
The network drive Z:\ contains some public software, for everybody

are changed, in one go, into :

The absolute path : "C:/Program Files(x86)/7-zip/Lang"
The network drive /share/Public/ contains some public software, for everybody

Notes :

• The (?i) modifier force the insensitive behaviour of the regex engine, even if the match case option is set, in the replace dialog ( Just in case, your text contains the string z:\, with a lowercase drive letter ! )

• The backslash character have a special meaning, in regexes. So, it must be escaped itself, with an other backslash character, to be taken, literally.

• The search regex contains two groups : group 1 = Z:\\ and group 2 = \\, between round brackets.

• The replace regex contains two conditional replacement groups : (?1/share/Public/), which writes the string /share/Public, if group 1 exists and (?2/), which writes a forward slash, if group 2 exists.

Best Regards,

guy038