When you are creating and modifying objects, it's important to make sure that the file, folder, and registry items don't exist prior to creating and modifying them. The test-path cmdlet allows you to test to see if a file, folder, or registry item exists prior to working with it. The proper syntax for this is first calling test-path and then specifying a file, folder, or registry location. The result of the test-path command is True if the object exists or False if the object doesn't exist.

To verify if files, folders, and registry entries exist, do the following action:

$testfolder = test-path "c:\Program Files\MyCustomSoftware\Logs"
#Update The Following Line with the Date/Timestamp of your file
$testfile = test-path "c:\Program Files\MyCustomSoftware\Logs\201503163824MyLogFile.txt"
$testreg = test-path "HKCU:\Software\MyCustomSoftware\"
If ($testfolder) { write-host "Folder Found!" }
If ($testfile) { write-host "File Found!" }
If ($testreg) ...