I am running a Dell simension 4800 with Win XP.Windows XP Home Edition Service Pack 2 (build 2600)   Dell Computer Corporation DIM4500
System Service Tag: 7R2TP11 (support for this PC)
Chassis Serial Number: 7R2TP11
Processor a   Main Circuit Board b
2.40 gigahertz Intel Pentium 4
8 kilobyte primary memory cache
512 kilobyte secondary memory cache   Board: Intel Corporation D845EPT2 AAA83421-106
Serial Number: CN02P9974811125S00ER
Bus Clock: 133 megahertz
BIOS: Intel Corp. A02 05/22/2002
Drives   Memory Modules c,d
79.98 Gigabytes Usable Hard Drive Capacity
39.06 Gigabytes Hard Drive Free Space

LITE-ON LTR-24102M [CD-ROM drive]
LITEON DVD-ROM LTD163 [CD-ROM drive]
3.5" format removeable media [Floppy drive]

HP Photosmart 3210x USB Device [Hard drive] -- drive 1
ST380021A [Hard drive] (80.03 GB) -- drive 0, s/n 3HV1QBSK, rev 3.75, SMART STATUS: Healthy   768 Megabytes Installed Memory

Slot 'DIMM1' has 512 MB
Slot 'DIMM2' has 256 MB
This is going to be a long one, so please bare with me.  When I have been starting my PC the past few days the following have appeared on my task bar (?) Windows Installer, Microsoft.NET Framework, and Tray App.  I am getting the following error messages:  Microsoft. NET Framework - An unhandeled exception has occuren in your application.  Click continue an the application will itnore this error and attempt to continue.  Object reference not set to an instance of an object.  
I have clicked on continue and it does not continue.
In another dialog box titled "Windows Installer"  It says "Preparing to install"  In another box I get this message Tray App - "The feature you are trying to use is on a CD ROM or other removable disk that is not available.  Insert the Tray App disk and click OK. "  In the "Use Source" block on this error message it has the digit "1"  When I click on "OK" I get the message "The path '1' can not be found.  Verify that you have access to this location and try again or try to find the installation package Tray App.msi in a folder from which you can install the product Tray App."  I have recently installed some software for a small digital camera.  I have attempted to erase and re-install this software and it has not made a difference.  I have done a reinstall on my computer and it has not helpe.  Eveytime my PC is started these error messages appear and I can not get the Tray Apps error message and the Tray Apps "Preparing to install" off of the display.  Any and all help would be appreciated.  I am not very knowledgeable about computers so you will need to keep it simple.  Thanks in advance to anyone that can assist or help.  Any and all suggestions will be appreciated.  John  :-?Are you using a printer?If so have you tried uninstalling and reinstalling your
printer?Hi John ,
It sounds like some software that was recently installed didnt completely install or the install failed for some reason. It sounds like it could be the digital camera installation.
There is probably some entry in the registry that is triggering these installers to be continually in your face .
I would try the following :
Go into "My computer" , C drive , Program files ....... and see if there is any folders in there that are related to the digital camera install....... there may be several .... [highlight]LOOK at the cds that came with the camera for their names. [/highlight]   if you find any ,see if you can manually delete them .

Then go to ..........  http://www.filehippo.com/download_ccleaner/  and download the latest version of ccleaner. .......  Its listed over on the right side.

Note do not install the yahoo toolbar it offers .
Once its installed ......... OPEN ccleaner .......... now click on the cleaner icon ( it looks like a wide paint brush .  then down in the lower right corner click on RUN CLEANER .....  when it's finished, click on run cleaner again you will see a message about things being deleted ....answer ok ......... after it runs , go back over to the upper left corner and click on the "issues" icon , then over in the right pane ..... click on "scan for issues"  it will scan and a list of issues will appear , now click "fix issues" ........ you will be prompted to backup the registry ..... answer yes ....... and then click fix all selected issues and the "ok" .....
[highlight]Just so you know John , ccleaner will not remove anything that would cause problems for your machine. It is very safe and easy to use.[/highlight]

let us know if that gets rid of any of the messages you are seeing.

dl65  jbre1.......  Just been doing some looking and the issue with the trayapp.msi seems to be related to HP printers and cameras .
I see you have a hp priinter , by any chance is the camera HP as well?

dl65  
No, the camera is a $10 digital that my wife got me for Christmas to play around with.  It's made by that famous guy China.     But you are right about the HP being the problem.  I reinstalled the software for my printer and that has seemed to solve the problem.  It appears that a Microsoft Reader (part of the HP Program - I don't know) was the problem.  I really appreciate the assist.  As I recall, last week (I think it was last week) I began to download something from HP and then cut it off in the middle of the D/L and that may have caused the problem.  Thanks again (a million) and I hope there will be something I can do for you some day (need anything made from wood?).    John in El PasoHi John ,

Well done ....... something like that can be a real nuisance .......
Glad to have been of some assistance.

dl65  Tray Apps..........Usually go with a printer error.   Geez, here I go again.  I booted (started) my PC this morning and there we are again - I have the dialog box from Microsoft.NET Framework, Windows Installer, and the Tray App in my face again.  Yesterday I cleaned out and reinstalled eveything to do with my HP Printer and I thought that solved the problem.  After I did it, I restarted the PC and everything seemed normal.  Now this morning I have the problem back.  Does anyone have a gun - I want to shoot this thing. HELP     John in El PasoMicrosoft .NET Framework runtime files 3.0.Have you tried installing this?

http://www.softwarepatch.com/windows/netframework.html

Below is a direct download link.

http://download.microsoft.com/download/3/F/0/3F0A922C-F239-4B9B-9CB0-DF53621C57D9/dotnetfx3.exe