Hi radium
Sorry to hear of your problem......I can understand your wondering how you may have been compromised in spite of having a Norton product in place !
However....there are many thousands of vulnerabilities that are appearing daily...and all major Security orientated products have to be "on the ball" to keep ahead of these threats! ......and Norton is one of the best !
The "behind the scenes" sharing and collecting of relevant information to minimize the spread of these malware threats is a huge task....and inevitably , there can be a "window of opportunity" of a very brief timespan ......when threats can "get through" !
In cases like this ..it can be a simple matter of your having carried out a task ...or opened a link , in what can be called "The Wrong place at the Wrong time "syndrome!
As SendOfJive says.......have you used a bank provided protection application such as the Rapport Trusteer software that offer "Keylogging" protection and other security protection measures etc?
I have no experience of dealing with your particular bank...but some of the responses I received when I had an issue with my banking security late last year .......was less than expert at first!
It took a day or so before I got connected to someone who was able to offer a positive insight into a course of action to address the issue ..
Eventually the matter was resolved satisfactorily ...and I hope yours will be too .....My advice is to try and get specific detail of what the bank has based its' findings on regarding their suspicion of a virus infection !
The suspending of an account is a sensible initial step as it prevents any further unauthorised activity regarding your account ...but as you rightly say ...you are presently without a banl account !
In my case ...I was compromised in spite of years of experience regarding keeping my system safe ...but I still got zapped"
I wasn't using Norton at the time.of the attack..and thats' why I am back with Norton now!
I had the.... ( hopefully not to be repeated )... experience of logging into my banking site...and literally watching the balance diminish ....not nice !!
Do as advised elsewhere in previous posts.....try running a compatible scanner such as "Malwarebytes" which is well respected.....see if it throws up any issues that are suspicious?
Keep an open dialogue with the appropriate dept;. of your bank that deals with online security ...and ask if them if they have a specific pointer to a possible virus attack etc.
Shutting down your account naturally protects you...and it also prevents the bank making any loss by unauthorized transactions by criminal activity ......But you really need this sorting......carry out the further scans as advised...keep in close touch with the bank ...and don't loose faith in Nortons' protection
!!