Restart System and Run Powershell Script without logging in - powershell

Question

I have multiple restarts between script blocks, the problem is on every restart the user is required to key in their credentials, and log in.
Is there any way where once the script is being executed it can login to system without username and password? We would want to hardcode username and password in the script itself.
The script helps in achieving the following:
Run Script Block
Restart
Run Next Script Block
But this requires user to log in after restart. Until then the process is under halt. I am looking for a way to automate the login process as well... I know it creates security threat, but this is something that is necessary for the process I am supposed to achieve.
#Code which will run script with admin privileges
If (-NOT ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator"))
{
$arguments = "& '" + $myinvocation.mycommand.definition + "'"
Start-Process powershell -Verb runAs -ArgumentList $arguments
Break
}
# Temp Folder
if (!(Get-Item d:\temp -ea ignore)) { mkdir d:\temp }
$dropperscript = 'D:\temp\dropper.ps1'
$dropper = #'
#############################################
### Configuration Variables ###
#
# Put any variables you'll use here
#
### ###
#############################################
# Static Variables
$countfile = 'd:\temp\bootcount.txt'
$bootbatch = 'C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp\dropper.bat'
$dropperscript = 'd:\temp\dropper.ps1'
#################
##### Setup #####
# Bootstrap Batch
if (!(Get-Item $bootbatch -ea ignore)) {
$x='PowerShell.exe -Command "& {Start-Process PowerShell.exe -ArgumentList '''
$y=' -ExecutionPolicy Bypass -File "D:\temp\dropper.ps1""'' -Verb RunAs}"'
$x+$y| Out-File $bootbatch -Encoding 'OEM'
}
# Boot Count
if (Get-Item $countfile -ea ignore) {
[int]$bootcount = Get-Content $countfile
if ($bootcount -match "^\d{1,2}$") { ([int]$bootcount) ++ }
else { $bootcount = 1 }
}
else { $bootcount = 1 }
$bootcount | Out-File $countfile
switch ($bootcount) {
1 {
$File="D:\temp\Log.txt"
Get-Date | Out-File $File -Append
Get-Process | Out-File $File -Append
Restart-Computer -Force
##################################################
############### --REBOOT-- ###############
}
2 {
$File="D:\temp\Log.txt"
Get-Date | Out-File $File -Append
Get-Process | Out-File $File -Append
Restart-Computer -Force
##################################################
############### --REBOOT-- ###############
}
3 {
$File="D:\temp\Log.txt"
Get-Date | Out-File $File -Append
Get-Process('\\itdsl\MSNPLAT\Gold\MSNPATCH\msnpatch.exe') | Out-File $File -Append
Restart-Computer -Force
##################################################
############### Restart ################
}
4{
$File="D:\temp\Log.txt"
Get-Date | Out-File $File -Append
Get-Process| Out-File $File -Append
Restart-Computer -Force
##################################################
############### --END-- ################
}
default {
# Dropper is complete; clean up
rm $countfile
rm $bootbatch
rm $dropperscript
}
}
'#
# Drop and run Dropper
$dropper | Out-File $dropperscript -Encoding 'OEM'
Invoke-Expression $dropperscript