Win 7 64 crash ngx 520 Netflix

[Geek-9pm]

Title says nit all. I bought a refurbished Dell GX 520 with Windows 78 Pro 64 Bit.
Had to do a reinstall on a new hard drive using key from authorized builder.

I get a lock lock up while l watching Netflix using AT&T fast DSL.
No error messages.
It is a Pentium Dual Core.

CPUID CPU Name   Intel(R) Pentium(R) D CPU 3.40GHz

Windows reports 4 GB of memory.
I am using 32 bit Firefox, 64 bit Silver light.

I am on the GX 520 now using Windows 7 with Firefox and it is stable, But If I go to Netflix it will crash withing 30 min. While watching Nikita.

They say 64 bit Firefox is not ready.
I would like to use this box for Netflix. The sound is better.

Where do I start?.   

[Computer_Commando]

Does your DSL connection have the required bandwidth?
http://support.netflix.com/en/node/306#gsc.tab=0

[patio]

How much RAM ? ?

[Geek-9pm]

The bandwidth is 3 mega bit over DSL. Tested.
The RAM is 4GB, which is given as standard on a GX520.
I do not have other things running while watching Netflix.
The Win 7 64 bit is legit  and has COA.
The Win 7 was NOT installed by Dell. It was by a certified MS refurbish-er.
Windows 7 used its own drivers. There are no Windows 7 drivers that I can find on the Dell site.

I am open to any suggestions.

[patio]

Not having the proper drivers would explain it...
There are no Win7 drivers for that model...and not likely to be any.
So you should try all the available Vista drivers...some may work...but no guarantees.
You may have to revert back to XP or Vista to get everything running properly.

[Geek-9pm]

Yes, it does work in XP pro 32 bit. Which is legit for this machine. The win 7 pro 64 bit is also legit, but I find no specific drivers for this GX 520.

I loaded Vista 64 bit only to find I don't have a wireless that works with it.

Further testing indicates the problem is not with Netflix. Rather the problem is with the media player or the add-on. This might mean a video  driver issue.

By the way, this is an old dual core Pentium CPU with a 775 socket. Does anybody here recall any  issue that these early dual-core CPU s had? Wasn't there some patch for a NMI bug? Don't remember well.

[patio]

The patch was for AMD CPU's...
At any rate you should probably revert back to XP for everything to work properly.

[Geek-9pm]

Thanks Patio. You are right.
 I will just boot XP when I want to watch a movie on Netflix.