Printer Warning in event viewer

Everyday at the login period, I am getting the below event errors in the System event viewer. It is the printers that are instaleld on the computer. Are these events normal? I have followed the link for additional information that says this event is for informational purpose only, but why am I getting the warning? Can anyone please help:

Event Type: Warning
Event Source: Print
Event Category: None
Event ID: 20
Date: 5/17/2007
Time: 4:06:14 PM
User: NT AUTHORITY\SYSTEM
Computer: CPQ1530
Description:
Printer Driver HP LaserJet 1200 Series PCL 6 for Windows NT x86 Version-3 was added or updated. Files:- HPBF312G.DLL, HPBF312E.DLL,
HPBF312I.PMD, HPBF312I.HLP, HPBF312F.DLL, HPBF312H.DLL, HPBF312I.DLL,
HPBF312J.DLL, HPBF312K.DLL, HPBAFD32.DLL, HPBFTM32.DLL.

Event Type: Warning
Event Source: Print
Event Category: None
Event ID: 20
Date: 5/17/2007
Time: 5:15:18 PM
User: NT AUTHORITY\SYSTEM
Computer: CPQ1530
Description:
Printer Driver HP LaserJet 4100 PCL 6 for Windows NT x86 Version-3 was
added or updated. Files:- HPBF042G.DLL, HPBF042E.DLL, HPBF042I.PMD,
HPBF042E.HLP, HPBFTM32.DLL, HPJCMN2U.DLL, HPPAPTS0.DLL, HPBMINI.DLL,
HPBAFD32.DLL, HPBMMON.DLL, HPDOMON.DLL, HPBHEALR.DLL, HPNRA.EXE,
HPBOID.EXE, HPBPRO.EXE, HPPAPML0.EXE, HPBNRAC2.DLL, HPBMIAPI.DLL,
HPBOIDPS.DLL, HPBPROPS.DLL, HPJIPX1U.DLL, HPPASNM0.DLL, HPPAPML0.DLL,
HPBF042G.HPI, HPBCFGRE.DLL, HPLJ4100.CFG, HPCDMC32.DLL.


Event Type: Warning
Event Source: Print
Event Category: None
Event ID: 20
Date: 5/17/2007
Time: 6:38:43 PM
User: NT AUTHORITY\SYSTEM
Computer: CPQ1530
Description:
Printer Driver HP LaserJet 4100 PCL 6 for Windows NT x86 Version-3 was
added or updated. Files:- HPBF042G.DLL, HPBF042E.DLL, HPBF042I.PMD,
HPBF042E.HLP, HPBFTM32.DLL, HPJCMN2U.DLL, HPPAPTS0.DLL, HPBMINI.DLL,
HPBAFD32.DLL, HPBMMON.DLL, HPDOMON.DLL, HPBHEALR.DLL, HPNRA.EXE,
HPBOID.EXE, HPBPRO.EXE, HPPAPML0.EXE, HPBNRAC2.DLL, HPBMIAPI.DLL,
HPBOIDPS.DLL, HPBPROPS.DLL, HPJIPX1U.DLL, HPPASNM0.DLL, HPPAPML0.DLL,
HPBF042G.HPI, HPBCFGRE.DLL, HPLJ4100.CFG, HPCDMC32.DLL.

The event id 20 means that a printer driver was installed or updated, it is just an informational message only and there is no action required to be done for same.

Thanks for the explanation, so it means that it is safe to ignore this messages.

If you really look at this "Problem" Microsoft SHOULD do something about it. Not only is it downloading the drivers every time you print. It also consumes needless bandwidth to do so. Why install a printer if you have to retrieve the drivers from the server EVERY time you do anything. I.E. if you look at Printer Properties, you again are retrieving the driver off of the server...lame! since the printer is already installed. I say, "Disabling the printer notification" is a joke, the bandwidth consumption will not go away and you will still have the absurd delay when trying to get to the printing preferences.
My advice, DO NOT BACK DOWN. THIS IS A PROBLEM! if you setup the network printer as a local tcp/ip printer this problem will go away. As far as administration is concerned this is not an option for large Domains, etc.
p.s. network utilization peaks at 50% on occasion when opening printer properties. ummm, ok!