Bitcoin-QT - Bitcoin 0.9.1 failed to load 9/23 - install 0.9.2.1?

[Brahman]

Bitcoin 0.9.1 normaly starts each time Vista Ultimate is opened (over the last several months).

On 9/23/2014 Bitcoin load (opening) started - "verify files" -  then just when the wallet window would normally appear the application closed and Windows displayed the message -"The application has stopped running - Debug or close"

This repeats with,-
No other applications running
After all security scans etc..

I discovered new updates are available - (I did not receive a notification?)

Should I install the Bitcoin Core version? - would this recover my Wallet data and coins?

How do I keep my Wallet data (including coins) and blockchain if I install Bitcoin 0.9.2.1?

Thanks

Update 9/26/2014
Still not able to load Bitcoin
Tried many things including,-
Uninstall Bitcoin, Download clean copy from Bitcoin.org
Install Bitcoin Core 0.9.2.1
Starts to load,-
Verifying files
Scan
Load addresses
Then-
Wallet screen - off color with Vist Ultimate message " Bitcoin - qt.exe stopped running - Debug or Close

Choose Debug
Visual Studio Just in time Debugger - window
A unhandled win32 exception  --  (4684)

Yes debug Bitcoin_qt.exe
Copied from the VS debug window -
“Unhandled exception at 0x012b63c4 in bitcoin-qt.exe: 0xC0000005: Access violation writing location 0x00224b70.”

Reviewed the Call stack

Conclusions
Not able to load and open any version of Bitcoin

Did note ( may not be relevent)

9/23-24  Trend Micro Titanium - blocked Bitcoin file Au_exe.
Added to exception file

Bitcoin still does not load and open  -repeated many attempts

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[torusJKL]

You should always use the newest version of the Bitcoin Core application.
Before you upgrade make a backup of wallet.dat if you did not already do so (very recommended).

[dariuss]

Remember when you do upload your dat file, it needs to say wallet.dat not "whatevername.dat"

[BeginToMine]

Should be some error in system maybe ?

[Sonny]

Haven't experienced your problem myself, and I have no idea what caused it to happen.

How do I keep my Wallet data (including coins) and blockchain if I install Bitcoin 0.9.2.1?

AFAIK, your blockchain data and wallet.dat file shouldn't be affected by the upgrade.
But for safety, you should always keep a backup of your wallet.dat file just in case your HDD fails one day.
Don't forget to create a new backup when all of the keys in your keypool (it has 100 keys by default) are used up.

[Brahman]

Could you comment on the edits I submitted?
What is the appropriae way to use the forum to  continue the dicussion to get a solution?

[Brahman]

Notice
The problem was caused by my Trend Micro Titanium 2014 - (anti virus softare) was blocking Bitcoin software.
Solution
Install Titanium 2015
Install Bitcoin Core 0.9.3

Problem solved.