Unable to run Chocolatey from SMB share

### What You Are Seeing?
Attempting to run Choco Install, from a mapped share, or cygwin drive fails with invalid directory name

### What is Expected?
Package to install

### How Did You Get This To Happen? (Steps to Reproduce)

Mount a SMB Share

Set-Location to share

Choco Install

### Output Log
```
# Note H:\ is a powershell drive mapped to a SMB share.

[10:14:45][+0] H:\
? choco install vscode --debug --verbose
Chocolatey v0.10.3 Business
Chocolatey is running on Windows v 6.1.7601.65536
Attempting to delete file "C:/ProgramData/chocolatey/choco.exe.old".
Attempting to delete file "C:\ProgramData\chocolatey\choco.exe.old".
Command line: "C:\ProgramData\chocolatey\choco.exe" install vscode --debug --verbose
Received arguments: install vscode --debug --verbose
RemovePendingPackagesTask is now ready and waiting for PreRunMessage.
CountdownTask is now ready and waiting for PostRunMessage.
Terminal services setup not necessary for this session.
SynchronizeTask is now ready and waiting for PreRunMessage.
Sending message 'PreRunMessage' out if there are subscribers...
[Pending] Removing all pending packages that should not be considered installed...
[Synchronize] Updating packages with Programs and Features
[Synchronize] Currently only supports removals. Soon will handle updates.

Running in background mode
The source '' evaluated to a 'normal' source type

NOTE: Hiding sensitive configuration data! Please double and triple
check to be sure no sensitive data is shown, especially if copying
output to a gist for review.
Configuration: LicensedInformation.LicenseType='Educational'|
LicensedInformation.LicenseIsValid='True'|
LicensedInformation.LicenseIsTrial='False'|
LicensedInformation.LicenseUserName='[REDACTED]'|

LicensedInformation.LicenseExpirationDate='14/02/2018 00:00:00'|
LicensedInformation.LicensedVersion='1.9.7.0'|
LicensedInformation.LicensedProductVersion='1.9.7'|
ChocolateyVersion.Version='0.10.3.0'|
LicensedFeatures.UseDownloadCache='True'|
LicensedFeatures.AllowSynchronization='True'|
LicensedFeatures.UseBackgroundService='True'|
LicensedFeatures.AllowPreviewFeatures='False'|
LicensedNewCommand.UseOriginalFilesLocation='False'|
LicensedNewCommand.PauseOnError='False'|
LicensedNewCommand.BuildPackage='False'|
LicensedNewCommand.GeneratePackagesFromSoftwareInstalls='False'|
LicensedNewCommand.IncludeArchitectureInPackageId='False'|
LicensedNewCommand.GenerateForCommunityUse='False'|
LicensedDownloadCommand.Internalize='False'|
LicensedDownloadCommand.AppendUseOriginalLocation='False'|
LicensedUninstallCommand.FromProgramsAndFeatures='False'|
VirusConfiguration.VirusCheckMinimumPositives='4'|
VirusConfiguration.VirusScannerType='Generic'|
VirusConfiguration.GenericVirusScannerArgs='[[File]]'|
VirusConfiguration.GenericVirusScannerValidExitCodes='0'|
CommandName='install'|CacheLocation='D:\DeployRoot\tmp\Chocolatey'|
ContainsLegacyPackageInstalls='True'|
CommandExecutionTimeoutSeconds='2700'|WebRequestTimeoutSeconds='30'|
Sources=''|

SourceType='normal'|Debug='True'|Verbose='True'|Force='False'|
Noop='False'|HelpRequested='False'|RegularOutput='True'|
QuietOutput='False'|PromptForConfirmation='False'|
AcceptLicense='False'|
AllowUnofficialBuild='False'|Input='vscode'|AllVersions='False'|
SkipPackageInstallProvider='False'|PackageNames='vscode'|
Prerelease='False'|ForceX86='False'|OverrideArguments='False'|
NotSilent='False'|ApplyPackageParametersToDependencies='False'|
ApplyInstallArgumentsToDependencies='False'|IgnoreDependencies='False'|
AllowMultipleVersions='False'|AllowDowngrade='False'|
ForceDependencies='False'|Information.PlatformType='Windows'|
Information.PlatformVersion='6.1.7601.65536'|
Information.PlatformName='Windows 7'|
Information.ChocolateyVersion='0.10.3.0'|
Information.ChocolateyProductVersion='0.10.3'|
Information.FullName='choco, Version=0.10.3.0, Culture=neutral, PublicKeyToken=79d02ea9cad655eb'|

Information.Is64Bit='True'|Information.IsInteractive='True'|
Information.IsUserAdministrator='True'|
Information.IsProcessElevated='True'|
Information.IsLicensedVersion='True'|
Information.LicenseType='Business'|
Features.AutoUninstaller='True'|Features.ChecksumFiles='True'|
Features.AllowEmptyChecksums='False'|
Features.AllowEmptyChecksumsSecure='True'|
Features.FailOnAutoUninstaller='False'|
Features.FailOnStandardError='False'|Features.UsePowerShellHost='True'|
Features.LogEnvironmentValues='False'|Features.VirusCheck='False'|
Features.FailOnInvalidOrMissingLicense='False'|
Features.IgnoreInvalidOptionsSwitches='True'|
Features.UsePackageExitCodes='True'|
Features.UseFipsCompliantChecksums='False'|
Features.ScriptsCheckLastExitCode='False'|
ListCommand.LocalOnly='False'|
ListCommand.IncludeRegistryPrograms='False'|ListCommand.PageSize='25'|
ListCommand.Exact='False'|ListCommand.ByIdOnly='False'|
ListCommand.IdStartsWith='False'|ListCommand.OrderByPopularity='False'|
ListCommand.ApprovedOnly='False'|
ListCommand.DownloadCacheAvailable='False'|
ListCommand.NotBroken='False'|UpgradeCommand.FailOnUnfound='False'|
UpgradeCommand.FailOnNotInstalled='False'|
UpgradeCommand.NotifyOnlyAvailableUpgrades='False'|
NewCommand.AutomaticPackage='False'|
NewCommand.UseOriginalTemplate='False'|SourceCommand.Command='unknown'|
SourceCommand.Priority='0'|FeatureCommand.Command='unknown'|
ConfigCommand.Command='unknown'|PinCommand.Command='unknown'|
_ Chocolatey:ProChocolateyInstallCommand - Normal Run Mode _
Unable to run choco:
The directory name is invalid
Sending message 'PostRunMessage' out if there are subscribers...
[Countdown] Determining how long until license expires
Exiting with 0
```

No source file, test, or entry point is named. Reproduce on Windows 7 from a mapped SMB share or Cygwin drive using the documented `choco install vscode` command, then compare with a local directory. Done means the package installs successfully from the share while local execution continues to work.

Written by the indexing model from the issue text.