[Query for any machine that last contacted AD over 45 days]

If they haven't contacted AD, I'd say it's safe to assume that they probably haven't contacted SCCM either. You can use this WQL Query in sccm:

select
	SMS_R_SYSTEM.ResourceID,
	SMS_R_SYSTEM.ResourceType,
	SMS_R_SYSTEM.Name,
	SMS_R_SYSTEM.SMSUniqueIdentifier,
	SMS_R_SYSTEM.ResourceDomainORWorkgroup,
	SMS_R_SYSTEM.Client
from
	SMS_R_System
inner join
	SMS_G_System_CH_ClientSummary
on
	SMS_G_System_CH_ClientSummary.ResourceID = SMS_R_System.ResourceId
inner join
	SMS_G_System_SYSTEM
on
	SMS_G_System_SYSTEM.ResourceId = SMS_R_System.ResourceId
where
	SMS_G_System_CH_ClientSummary.ClientActiveStatus = 0

That'll find all inactive clients. So you can set your threshold for inactive clients to 45 days.

 

I did a bit of research and it looks like this should get clients that haven't logged into AD in 45 days. I haven't done extensive testing with this query, so do some spot checking to be sure it's getting what you need.

select
	SMS_R_System.Name,
	SMS_R_System.LastLogonTimestamp
from
	SMS_R_System
where
	DATEDIFF(dd,SMS_R_System.LastLogonTimestamp,GetDate()) > 45

[C:\Users\ADMINI~1 Folder]

I have this same folder appearing. I just added a step toward the end of my deployment TS to delete the folder.

[Automating Printer Driver Updates]

Is there a way to automate the update of printer drivers from Microsoft update? I'm referring to the dialog in which you are adding a new printer, and there is the option update the local driver store using Microsoft Update. I've attached a screenshot for reference.