A little history about my computer.......I have a Micron PC.....pretty old. I've wiped and reloaded Windows XP at least 3-4 times since I've had it! Usually it's due to a virus that my kids have gotten on it by clicking on those stupid little pop-ups that they see!

Anyway....I've always had good luck with it until this time around. I've wiped and loaded XP three times just in the past two days. I keep getting Fatal errors, shutdowns, plus multiple other problems. Here's some of the error messages I get before I finally get into Windows.
*Digital signature catalog D:/I386/NTPRINTER.CAT could not be installed....fffffc06
* The system cannot find message text for message number 0xfffffc06 in the message file for syssetup.dll.
* The signature for Windows XP Professional upgrade is invalid. The error code is 6ba.
* The RPC server is unavailable.
* Setup failed to install the product catalogs. This is a fatal error.
Then, if I should have to shut down, I sometimes get a message that says something like "Had to shutdown....unexpected error in terminal....f0xc0000096. Also, I can't get Windows Updates....keeps giving me this error code 0xC80003FA. I've already gone through the help processes I was given as far as emptying the internet cache, renaming my Software Distribution folder, stopping and restarting the files Automatic Updates, Background Intelligent Transfer Service (BITS), and Event Log.
Once I get into Windows, I have no problems getting online or anything.....but, it takes me several tries to get to that point. I also can't install any programs (MSN Messenger, AVG, etc.)....gives me error codes on those too! Can someone please help? Thanks!!
P.S. Forgot to add that I tried to do a Repair a couple times first, but it said my cabinet files were missing or something like that. So, I had to wipe and reload.