用Powershell替换系统路径中的字符串

Question

I need to change C:\\Program Files (x86) in C:\\Progra~2 in the system path variable. I was thinking to do this with Powershell, so I came up with the following script.

$NewPath = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment' -Name PATH).Path

$OldValue = ${Program Files (x86)}
$NewValue = "Progra~2"

$NewPath = $NewPath -replace $OldValue, $NewValue

Set-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment' -Name PATH –Value $newPath

$NewPath

The output is unfortunately not what I expected.

Progra~2oProgra~2mProgra~2eProgra~21Progra~2\Progra~2oProgra~2pProgra~2mProgra~2nProgra~2\Progra~2bProgra~2iProgra~2nProgra~2;Progra~2CProgra~2:
Progra~2\Progra~2OProgra~2rProgra~2aProgra~2cProgra~2lProgra~2eProgra~2\Progra~2MProgra~2iProgra~2dProgra~2dProgra~2lProgra~2eProgra~2wProgra~2a

Can anyone help me out with this?

Answer 1

$OldValue = ${Program Files (x86)}

should be replaced by

$OldValue = "Program Files \(x86\)"

Backslashes \\ escape the parens interpreted as a regex by -replace